Clean and Unclean (Leviticus 11:1 to Leviticus 15:33).
The priesthood having been informed of their responsibility to discern between what was ritually clean and what was ritually unclean (Leviticus 10:10), five Chapter s now deal with the question in order to provide them with guidance (compare Ezekiel 22:26 for their later failure to do this). The question of clean and unclean brings out Israel's world view, and stresses the difference between walking with God, and enjoying life and enjoying what is pure, in other words what is ‘clean', and grovelling in what is ‘unclean', with its connections with impurity and death, urging men to the former away from the latter.
In order to appreciate the significance of this we need first to recognise what precisely is involved. The purpose behind the idea of cleanness and uncleanness is not mainly hygiene or moral uncleanness. Rather it emphasises in a general way the holiness and perfection of God, and our need to escape from and avoid and rise above degradation and death. We have already seen that sacrifices and offerings are to be ‘perfect' or ‘without blemish'. This is a pointer to the concept involved. In emphasising what is clean and unclean God seeks only what is totally ‘perfect', what is wholly right, for Himself and for His people. What is clean is best. What is not clean is not best.
But we must not confuse holiness and ‘cleanness'. Holiness goes much further than cleanness. Things can be clean and not holy. And there are degrees of holiness within the area where all is ‘clean'. For holiness is to do with what God is, and what man's attitude towards Him is, while cleanness has to do with what man is and with his attitude to his environment. This clearly impinges on holiness, but it is looking at it from a very different angle.
In order to be ‘holy' enough to enter the tabernacle court men needed to be ritually ‘clean', but being clean did not render them ‘most holy'. Yet the constant awareness of the need to avoid what was ‘unclean' in God's eyes did bring God's Law very much into the daily lives of the common man. This included both its moral and its ritual requirements. It constantly made them think of what was for their good in accordance with God's commands, what was ‘clean', what was wholesome for those who were holy. But there can be no doubt that God also used these distinctions in order to keep them healthy, to let them see that in the uncleanness and decay of much of nature lay unknown dangers, to test their obedience, and to remind them constantly of His holiness.
There are also grounds for recognising that some of the living creatures which were unclean were seen as such because of their connections with various gods, although this may simply be because in their worship men regularly seek what is low. This would tie in with the general principle of perfection and wellbeing. While it is argued that in that case the bull ox would also have been unclean due to its prominence in the Baal religion, the answer to that might simply be that the bull ox had been recognised as clean for so long that it countered any other interpretation.
With, for example, the pig, which was revered and feared in religions elsewhere, the position was different. The black pig was taboo to worshippers of Horus in Egypt because Seth as a black pig had once blinded him. In certain Hittite rituals a pig was slaughtered in order to protect the sacrificers from evil curses. And pigs were associated with certain Syrian-Canaanite cults. This, even if not suggesting it, would certainly have helped to confirm the pig's uncleanness. And ‘creeping things' were undoubtedly connected with idolatry in Ezekiel 8:10. But nothing of this is even hinted at in either Leviticus or Deuteronomy so that we can only see it as of subsidiary significance.
The Law depicts Yahweh as supremely holy, that is uniquely ‘set apart' as One Who is wholly good, wholly righteous, uniquely powerful, and then reveals grades of descent from God's holiness and perfection into spheres of lesser and lesser holiness (‘set apartness'). This is because man could not fully cope with the full holiness of God.
On the one hand therefore the Law is very much designed to bring out God's uniqueness and extreme holiness, together with the Priest's and Israel's special position before Him, but on the other it reveals intermediate levels of holiness until it comes down to where uncleanness intervenes and then goes on to the other extreme of ‘uncleanness' which is to do with death and extreme impurity.
God is the living God, and, for Him, to be holy is to be supremely alive and pure. For man to become fully holy would be to become wholly alive and pure, and not only free from all the claims of death, but living positively to the full. For man to miss out on that, even by a fraction, would be to miss out on the very best. But man is far from that. He is weak and failing and that best is so far beyond him that it could only be a distant hope to be brought about by the grace of God. God therefore begins to lead him in ways that will enable him one day eventually, step by step, to understand that best, and this was indeed stated to be the purpose of the Law. It was that man might finally find true life (Leviticus 18:5).
This was to be revealed to him in two ways. Firstly by his coming to appreciate the full holiness of God, an awareness of God's environment, and of His righteousness and purity (see Isaiah 57:15), and secondly by being made aware of what is wholly clean, what is best and most ‘perfect' in man's environment. Thus would his mind be turned towards God. With that in mind let us first consider the levels of holiness.
The Levels of Holiness.
1). There is what is supremely holy, the very ‘Holy of Holies' (the Most Holy, the Holiest of All) itself, the throne room of the living God, remote from man in the tabernacle, inaccessible to any but the High Priest and he only once a year after complicated rituals of preparation which had made him especially holy. There God had at times revealed something of His glory.
It is the highest level attainable for those on earth, and then was only attainable by the High Priest once a year, and that only for a short while. But it is where Christ has now entered for us, and He has made a way open for us, so that we are so privileged that we may enter the Holiest in Him (Hebrews 10:19). This is the level which we should be enjoying in our fellowship with Him. It requires total commitment and full absorption in God, but for most it is only attained in its fullness at rare times. We may glibly speak of entry into the Holiest. But until we really become aware of the glory and holiness of God we have not really entered. Jesus Christ has made it possible, but like the children of Israel with Moses we ask that His face be veiled. For to see His face would take up too much of our lives.
2). Then there is the next level, what is extremely holy, the Holy Place and what is involved with it, so holy that nothing that pertains to it may remain in the camp outside the Holy Place, except temporarily. It has to be burned in a clean place outside the camp This includes the remains of the purification for sin offerings for priests and for the whole congregation, whose blood is brought into the Holy Place. Only the priests may enter or deal with such matters, and that only when they are ‘clean' (a basic requirement), when on duty and properly attired, and having washed hands and feet with water to remove even the earthiness of the courtyard, and of things that they have touched. Any part of those offerings is extremely holy. Such extremely holy things must not remain within the Sanctuary precincts nor in the camp. What remains after making the offering must be burned with fire in a clean place outside the camp in order to go to God.
This is a slightly lower level of holiness from that of supreme holiness, enjoyed only by the priests, when they daily trimmed the lamps and offered incense on the altar of incense. But we being made priests in Christ have it opened up to us. It is enjoyed by those whose lives are genuinely fully committed, who walking before Him and in His sight trim the lamps of witness, testimony, and good works (Matthew 5:16), who offer the daily incense of praise and thanksgiving, but have not yet, or only at times, attained the higher level. But they do choose to live totally and completely as priests to God and on behalf of men, revealing it in witness, intercession, prayer, worship and thanksgiving, committing themselves to God as a living sacrifice, and seeking to be wholly acceptable to God. They live in the Holy Place.
3). Then there is what is ‘most holy'. It is not so holy that it is confined to the Holy Place, but it so holy that it must not leave the Sanctuary precincts or be touched by any but the priests. This includes all offerings and sacrifices, once offered, apart from the meat of peace/wellbeing sacrifices, but especially refers to the portions that the priests, and they alone may eat, meat from purification for sin offerings (Leviticus 6:29) and grain from grain offerings (Leviticus 2:10). If anyone apart from a priest touches them that person becomes ‘holy' and thus subject to the restrictions of priests without actually attaining office (Leviticus 6:18; Leviticus 6:27).
In these days this lower level is attained by those who are set apart in Christ in holiness, who truly serve Him, but who have not yet reached the level of faith of living always in the presence of God. Their faith and dedication needs an upward lift.
4). Then there is what is ‘holy', but is not so holy that it is not allowed to leave the Sanctuary precincts, for the camp also is holy, although not always fully clean. These holy things may be dealt with in a clean place within the camp. They include the priests' portions of peace sacrifices, and the flesh of the peace sacrifices returned to the offerer, which must be eaten in a clean place and not by anyone while unclean. They are therefore more holy than the camp.
This is the level of the average Christian who walks with God, seeks to avoid uncleanness and the desires of the flesh, but whose commitment and dedication is not sufficiently full to enjoy the higher blessings.
Up to this point all this holiness has been free from any taint of uncleanness, for participation has only been allowed by those who are ‘clean'. In a sense the camp is the last stage of holiness and is the place where distinctions between clean and unclean begin to impinge. For this is where God's holy people confront what is less than wholesome, what is less than ‘perfect', what may come short in one way or another of contributing to their wellbeing.
5). The camp of Israel is holy (Deuteronomy 23:14), but it is of an even lesser holiness than the clean places within the camp, for those who are mildly unclean may remain in it in their tents, and the part in which they are is then unclean until they themselves are clean. And in the same way the nation of Israel, and all who join it within the covenant by circumcision, are holy (Exodus 19:6), for they are God's covenant people, and yet they may be temporarily unclean. However because they are holy they must seek not to defile themselves by disobedience and by contact with what is unclean, and take whatever precautions are necessary to deal with uncleanness and prevent it affecting the holy. While unclean they are not so holy that they can come in direct contact with the holiness of God.
This is the level of the low level Christian who is satisfied to honour Christ but is also seeking to enjoy life in general and does not want to be too restricted. He wants to be allowed his periods of ‘uncleanness'. He is an ‘also ran'.
6). Then there is outside the camp of Israel. This is not holy, but it is more complicated for it is divided into the clean and the unclean. Firstly there are (undefined) ‘clean places' (Leviticus 4:12; Leviticus 6:11) where what is extremely holy may be burned and where the ashes from the altar of burnt offering may be deposited. Secondly there are places which cannot be unclean, for men can go there without becoming unclean, and clean animals rove there without becoming unclean. But as with the camp unclean things impinge there. Thirdly there are places which are unclean because unclean people, non-Israelites, live there who do not observe the rules of cleanness and uncleanness. Fourthly there are places which are unclean because they are the haunts of what is unclean. There there is much which is unclean, with which even indirect contact must be avoided. And fifthly there are unclean and defiled places (Leviticus 14:40-41; Leviticus 14:45) where death and uncleannesses must be put and must remain. Man's excrement, for example, must be put in a designated special place outside the camp (Deuteronomy 23:13-14 compare Leviticus 5:3) and must be buried there, as must the building materials of buildings condemned for certain fungi and rotting (Leviticus 14:40; Leviticus 14:45). We are not given details of these places, only their function. It may be that they were simply designated areas for refuse.
On the whole the inhabited world outside ‘the camp' and outside later ‘Israel', was probably seen as unholy, and as largely ‘unclean', except possibly for the land suitable for grazing, arable land and pasture in the wilderness (not, of course, too strictly defined), for even in generally unclean lands, these were presumably seen as mildly clean, otherwise clean wild animals would become unclean.
But the ground was cursed in Genesis 3:17, and the snake was cursed ‘above all cattle and above every beast of the field', and sentenced to grovel in the dirt, to ‘eat the dust' (Genesis 3:14), a phrase which at a minimum indicated something totally low, ignominious and unpleasant. And this ground would only yield man his food after great and laborious effort. He would have to restore it to usefulness. It had become his adversary. And the dust was what man would return to (Genesis 3:19), it was the dust of lifelessness and death above which man had been raised, but only for a time. He would return to it in death. Thus what lived in the dust of the ground was unclean.
This ties in with chapter 11 here for a separation was made in Genesis 1-3 along similar lines to here, between animals both wild and domestic, and the other land creatures, and creeping things which grovelled in the dust, which thus became unclean, together with the birds of the air and the fish of the sea (Genesis 1:20-21; Genesis 1:24-25; Genesis 1:29-30). The intention was that all would eat vegetation or ‘green herbs' (Genesis 1:30). It would seem that that was seen as the ideal and that those that began to subsist on other things become ‘unclean', although later man's right to eat of animals is confirmed (Genesis 9:3), but he would be expected to use discernment.
In Genesis 2:19-20 it is only the cattle, the wild beasts and the birds which are seen as within man's domain, and in Genesis 3:14 we come across ‘cattle', ‘beasts of the countryside' and a reptile, the latter despatched to lurk in the dust as a punishment. It should not therefore surprise us if animals which nuzzle in the dust, and reptiles and creatures that live in the dust and never rise above it are seen as especially unclean, and even more ‘creeping things', for the dust is what man who dies will return to. It is the dust of death (Psalms 22:15; Psalms 22:29; Psalms 30:9; Psalms 104:29; Ecclesiastes 3:20; Daniel 12:2). To ‘cleave to the dust' was considered to be the same as dying (Psalms 119:25). It was a world of death. And while the curse was partly relieved by God's covenant with Noah as far as man was concerned (Genesis 9:21), which might explain why grazing land and arable land could be seen as ‘clean', it certainly did not remove the whole curse. Thorns and thistles are still man's bain. The earth is still man's adversary and seeks ever to return to the wild or to desert. And all this was closely linked with death (Genesis 3:19; Genesis 5:5), which was the final sentence.
The same distinctions are mainly found in the story of the flood (Genesis 7:8; Genesis 7:14; Genesis 7:21; Genesis 7:23; Genesis 8:19), but there we are introduced to clean and unclean animals and birds, only the clean of which can be sacrificed (Leviticus 7:2; Leviticus 8:20).
It is possible that the ‘clean places' as in Leviticus 4:12; Leviticus 6:11 are those where it is considered that death does not usually take place and where man's and animal's uncleanness would not have reached, thus remote almost inaccessible spots, but they are never defined specifically, and it may be that they were places especially set aside and cleansed, (although if this is so it is never mentioned). But the fact that there could be these ‘clean places' suggests that the created world was originally seen as fundamentally clean, (God saw that it was good), but as having been largely defiled by death and uncleanness, that which is related to opposition to God.
But in terms of living things only Israel, and those who worship Yahweh, are now holy and that because cleansed by God, while certain animal, birds and fish are ‘clean', and can therefore be eaten, but they are not spoken of as holy. To be holy is to be in a relationship with God, or to be God's special possession.
We could see ‘outside the camp' as largely signifying the level of those who are not in Christ. Some are relatively ‘cleaner' than others, but none are in the camp and holy to God.
Connected with these degrees of holiness that we have described therefore, and at the bottom end, we must fit in the ideas of what is ‘clean' and ‘unclean'. These things affect holiness but are not the same thing. They are to do with man's contact with the world through his body. Nothing of this uncleanness is ever to be brought into contact with the tabernacle. To do so deliberately would be to warrant death. If discovered as occurring unwittingly it will require guilt offerings (Leviticus 5:2-3).
And while mild uncleanness is allowed in the camp, the camp too must be kept separate from it, and the aim is always to be rid of any such uncleanness as quickly as feasible. Meanwhile it must be contained within the tent, and by avoiding contact with others.
It should be noted that something can be clean but not holy. But it cannot be unclean and holy. This is especially so with regard to food. Food that is unclean must be abhorred by Israel. It will defile the holiness of any of the people involved with it. It will make them less whole and pure. Thus it is necessary to distinguish between clean and unclean foods. But certain animals are seen as ‘clean' wherever they are, unless they have been defiled in some way. Thus to be ‘clean' is not the same thing as to be holy. However the converse is true, what is ‘unclean' is not holy, and at least to some extent defiles holiness.
And at the bottom end of uncleanness are things that defile the land, murder, adultery, idolatry and so on (Leviticus 18:6-27; Leviticus 20:2-22). These are the extremes of ‘uncleanness'. Those who do such things must be cut off. Their end is death, for death is the final end of uncleanness. So if their bodies are hung on a tree in order to disgrace them, they are not to stay there overnight, for it would render the land unclean because they are accursed by God. Thus they must be buried (Deuteronomy 21:23). It was for such uncleannesses that Israel would be finally expelled from the land (Leviticus 18:25).
So cleanness and uncleanness refer to men's relationship to themselves and to the world, and how they react to the world, although they do also affect their position before God. And as will be seen there are certain basic rules regarding the cleanness of living things, and they have a certain logic to them. If fully followed out they would undoubtedly have contributed to human health, but that, at least humanly speaking, would not be seen as their main purpose, and it does not mean that all unclean things are always physically unhealthy for humans, only that they would be ill advised to partake of them because of how often they are. But the main reson why they must not eat of them is because God has not appointed them for men. Abstaining from them is a sign of being God's men and women.
Men like Moses may well have learned certain basic medical rules from observation. But a detailed individual diet list giving individual ‘clean' items would have been neither wise or practical, and would have been observed more in the breach than in the fulfilment, and one is not given. Nor was this the main purpose of establishing things as clean, although from a health point of view there is no doubt that avoiding unclean things would have contributed to good health.
The real significance of cleanness and uncleanness was with regard to ‘perfection' and ‘imperfection', to ‘wholeness' and ‘unwholeness', to making men ritually ‘without blemish'. The aim was to keep God's people involved only with what was ‘perfect', with what was pleasing to God, and this would result in their being ritually and morally clean as they lived to do His will, rising above what was most unpleasant in the world. It meant avoiding all that was unclean in any way, however seemingly desirable, and, when they fell short it, involved their going through the necessary process for the removal of that uncleanness. For what was unclean was in general harmful, and would remove them from the state of wholeness that should be theirs, so that if possible the situation had to be rectified. If it was not rectified they would be removed from the camp, for anything other than temporary uncleanness would defile the camp and make it unholy.
We have already observed the constant necessity for the removal of sin, and of all breaches of the covenant, which was a special kind of unholiness to do with ritual and moral failure. We now see the requirement also to be ‘clean' in everything in relationship with creation.
To summarise we may consider the various levels of humanity (if we leave Moses out of account who was unique). There is first the High Priest, then the priests, then the blemished priests. The first can enter the Holy of Holies, the second the Holy Place and the third can partake of what is most holy, but cannot enter the Holy Place. These in descending order can deal with ‘most holy' things as long as they are ‘clean'. Then come the people when clean, allowed into the tabernacle court, then the people when temporarily unclean, and not allowed,while unclean, in the tabernacle court, and then the people who are blemished who cannot enter the tabernacle court. But all these may remain in the camp. Then come the people unclean and excluded from the camp but kept within range, for whom worship can be conducted and offerings made. And then finally come outsiders not connected with the camp. All these described are as a whole split into clean and unclean. Any of these who are rendered unclean, even the High Priest, must not enter the Sanctuary precincts while unclean. None who are blemished may ever do so. Although they, and ‘strangers', may offer sacrifices and offerings. They are not excluded from God (Numbers 15:14; Numbers 15:16). Only the High Priest and the unblemished priests may enter the Holy Place as long as they are ‘clean'. Only the ritually ‘clean' may enter the tabernacle court. But in all cases, from highest to lowest, all approaches are only through offerings and sacrifices. To be clean was not to be sinless.
One important lesson we should learn from all this is that God is not to be approached lightly. Those who would know Him fully must recognise His purity and truth and come to Him in purity and truth, and must therefore recognise and acknowledge their need for cleansing, for atonement and forgiveness, and for cleanness of life from all that is unclean. The exclusion of the blemished (what is not perfect) is not intended as a slight on them, but as a reminder of the supremely perfect and unblemishes being of God.
As we go through the laws of uncleanness we will discover a pattern based on the first five Chapter s of Genesis. The tradition behind Genesis was Scripture for the people of Israel under Moses. It dealt with the roots of life, leading up to the promises given to Abraham. In Genesis 1 the world was created, and with it all living creatures. In Genesis 2 God prepared man's dwelling place on earth, and set him over all cattle, wild beasts and birds. And he walked naked, authoritative and tall, and was not ashamed. But what crept on the ground was not said to be submissive to him. And in Genesis 3 this was evidenced when mankind fell into sin, deceived by the serpent, and the serpent was cursed and was sentenced to the dust, and the woman who first sinned was punished in the very thing that was dearest to her, the ability to conceive, and the ground which produced man's food was cursed.
So we have in descending order, God, man, animals and birds, creeping things of the ground, the latter outside man's control.
From now on man had to be clothed, and God made for him suitable clothing. Then man was sentenced to be cast from the Garden, excluded from the place where God had walked with him. He was unclean. He would no longer be ‘in the camp', but was cast out, and the world would abundantly produce thorns and thistles to hinder his labours. This was when he was first introduced to clothing to hide his nakedness.
But then came a new beginning, when man triumphed and was restored into fellowship with God as Abel offered his ‘gifts' to Him. Man could once more enjoy God's blessing. But Cain slew Abel and then went away and built the first houses in his ‘city', and his line was built up as a result of their sexual responses. Meanwhile godly man began to ‘call on the name of Yahweh', and thus in chapter 5 we have the line of men who were born, and lived and died, again the result of sexual responses, both good and bad.
It is surely not a coincidence that the laws of uncleanness follow this pattern. Leviticus 11 connects with Genesis 1-3. Leviticus 12 connects with the punishment of the woman in Genesis 3:16; Leviticus 13:1-46 connects with the casting out of the man from the Garden in Genesis 3:17-19 with Genesis 3:23-24; Leviticus 13:47-59 connects with God's provision of their first clothing in Genesis 3:21; Leviticus 14:1-32 connects with the restoration of fellowship and the new beginning in Genesis 4, and Leviticus 14:33-53 connects with ‘the building of a city' on arrival in the land also as in Genesis 4:17. And finally Leviticus 15 deals with the means of reproduction and the organs of reproduction as illustrated in Genesis 4:18 and Genesis 5:1-32). We might then see Leviticus 16, with its emphasis on the great Day of Atonement, which gave Israel a new beginning every year, as reflected in the story of the Flood when God decided to make a new beginning, and enabled man to begin again, by sacrificing clean animals and birds on an altar. He gave them a new start, as He would now give Israel one, once a year.
So with all this in mind let us now consider this chapter, which deals with what food is clean and may therefore be freely enjoyed by the people, and will not make them unclean, and what is unclean and should be avoided for one reason or another. But one warning. The purpose of these restrictions was not in order to be a list of all harmless foods, although they certainly did prevent the eating of many harmful foods, nor was it in order to declare that what was unclean was necessarily bad in itself, it was in order to set apart His people from all others, and to lift them up from the squalor of the world and from the taint of death. It was to make them holy. It was in order to lift them above all that was degrading, and to keep them living before Him in purity, and in recognition that death and all connected with it is the very opposite of all that God is. It was to ensure their wellbeing and their wholesomeness. It was to keep them out of the dust of death (Psalms 22:15; Psalms 22:29; Psalms 30:9; Psalms 104:29; Ecclesiastes 3:20; Daniel 12:2).
Thus God's aim is to keep His people from all that is unholy, that is, from all that is in general terms unlike Himself, all that was not created specifically for man's benefit, and all that might be harmful either spiritually or physically, and it was especially to separate him from the taint of death.
In going into the world His people would inevitably occasionally become ‘unclean', but provision was now made for the conscious removal of this uncleanness, and warnings given not to deliberately step beyond the bounds laid down. For disobedience is the ultimate uncleanness.
It will be noted in what follows that the creatures that are ‘clean' are those that are (as seen by the Israelites) wholly grazing animals, still eaters of herbs (Genesis 1:30), and not predators (death-dealers) and blood-eaters; or are those that swim in the open water well away from the dirt and the mud; or are those that eat vegetation and leap and are not tied to crawl on the earth. Each keeps to its proper sphere. In no case therefore do they do lurk and crawl in dirt and filth, among the dust that the snake was to grovel in, and to which man, when he ceased to be man and became an empty shell with its breath withdrawn, would return. And to which the carcases of all beasts would return. That was the realm of death. This must be seen from a ‘common knowledge' aspect, not as a naturalist. It is the basic ideas that are being conveyed.
There is an important lesson here for Christians. We too can enter the Holiest of All through the blood of Jesus. We too can gather together to worship in holiness, having a ‘rarified' time. But we too cannot enter God's presence until cleansed. We too have to go out into the world and must choose between what is wholesome and what is degraded, and must avoid what is degrading and choose the wholesome. This is all a warning to us to discern between what is spiritually clean and what is spiritually unclean (2 Corinthians 7:1), although not necessarily in the terms laid out in what follows. For as Jesus pointed out, it is what is in the heart of man that is really unclean (Mark 7:18-23). And for us too the depths of uncleanness is murder, adultery and idolatry.
Chapter 15 The Uncleanness Related To Sexual Activity and Sexual Flows.
This chapter concentrates on the fact that emissions from the sexual organs result in uncleanness. This meant that those who had in one way or another been in contact with or had emitted sexual flows were unable to approach God direct because they were unclean. They were also unable to enter the tabernacle court that day. This would be a complete answer to the Canaanite emphasis on sex as a religious exercise. To Yahweh sex and religion were unrelated, and sexual activity prevented the deepest level of religious experience from occurring on the same day as the sex was partaken of.
As far as Israel was concerned it is probable that they saw all male emissions from the sexual organs as life implanting, without recognising the difference between semen and the emissions from venereal and other diseases. It was God's laws of uncleanness, in this case unique in the ancient world, which saved them from the worst results of such a belief by preventing excessive contact with infectious flows on the grounds that they would make a man ‘unclean'.
We have earlier suggested that Moses may well have in mind in this law of uncleanness a continuation of the Genesis theme. This may be so here with the emphasis here on Genesis 5 where there is the continual birth one after another of the patriarchs in the list, and of their sons and daughters. These were men and women born in the image of Adam (Leviticus 5:3), although there was still something of the image of God in them (Leviticus 9:6). Here was a triumphant picture of the continual birth of men and women after the fall, a flow of life, but counteracting it was the equally emphatic fact of final death for each one. The imperfection of their birth was the death sentence on them as soon as they were born. They were born, they bore children and they died. Their birth systems were ‘unclean'. They were not ‘perfect'.
And it is therefore reasonable to see there a reason why sexual emissions were seen as ‘unclean', as not ‘perfect'. For while they did produce new life, it was always life that resulted in death. And this on top of the fact that in the Garden the woman's reproduction had been rendered painful as a punishment.
Note in passing the careful structure of the passage.
1). A man's unusual emissions.
2). A man's usual emission.
3). A woman's usual emission.
4). A woman's unusual emissions.