And Moses went into the midst of the cloud, and gat him up into the mount: and Moses was in the mount forty days and forty nights. Forty days and forty nights - During the whole of this time he neither ate bread nor drank water; see Exodus 34:28; Deuteronomy 9:9. Both his body and soul were so sustained by the invigorating presence of God, that he needed no earthly support, and this may be the simple reason why he took none. Elijah fasted forty days and forty nights, sustained by the same influence, 1 Kings 19:8; as did likewise our blessed Lord, when he was about to commence the public ministry of his own Gospel, Matthew 4:2.
1. Moses, who was the mediator of the Old Covenant, is alone permitted to draw nigh to God; none of the people are suffered to come up to the Divine glory, not even Aaron, nor his sons, nor the nobles of Israel. Moses was a type of Christ, who is the mediator of the New Covenant; and he alone has access to God in behalf of the human race, as Moses had in behalf of Israel.
2. The law can inspire nothing but terror, when viewed unconnected with its sacrifices, and those sacrifices are nothing but as they refer to Jesus Christ, the Lamb of God, who alone by the sacrifice of himself, bears away the sin of the world.
3. The blood of the victims was sprinkled both on the altar and on the people, to show that the death of Christ gave to Divine justice what it demanded, and to men what they needed. The people were sanctified by it unto God, and God was propitiated by it unto the people. By this sacrifice the law was magnified and made honorable, so Divine justice received its due; and those who believe are justified from all guilt, and sanctified from all sin, so they receive all that they need. Thus God is well pleased, and believers eternally saved. This is a glorious economy, highly worthy of God its author.
Commentary on the Bible, by Adam Clarke [1831].