For the unbelieving husband is sanctified by the wife That is, so far that their matrimonial converse is as lawful, holy, and honourable, as if they were both of the same faith: and in many instances the unbeliever, whether husband or wife, hath been converted to God by the instrumentality of the believing partner. The former sense, however, and not this latter, seems to be the primary meaning of the apostle. Else were your children unclean And must be looked upon as unfit to be admitted to those peculiar ordinances by which the seed of God's people are distinguished; but now are they holy Confessedly; and are as readily admitted to baptism as if both the parents were Christians: so that the case, you see, is in effect decided by this prevailing practice. So Dr. Doddridge, who adds, “On the maturest and most impartial consideration of this text, I must judge it to refer to infant baptism. Nothing can be more apparent than that the word holy signifies persons who might be permitted to partake of the distinguishing rites of God's people. See Exodus 19:6; Deuteronomy 7:6; Deuteronomy 14:2; Deuteronomy 26:19; Ezra 9:2; Acts 10:28, &c. And as for the interpretation, which so many of our brethren, the Baptists, have contended for, that holy signifies legitimate, and unclean, illegitimate, (not to urge that this seems an unscriptural sense of the word,) nothing can be more evident, than that the argument will by no means bear it; for it would be proving a thing by itself, (idem per idem,) to argue that the converse of the parents was lawful, because the children were not bastards; whereas all who thought the converse of the parents unlawful, must of course think that the children were illegitimate.” Thus also Dr. Whitby: “He doth not say, ‘else were your children bastards, but now they are legitimate,' but
‘else were they unclean;' that is, heathen children, not to be owned as a holy seed, and therefore not to be admitted into covenant with God, as belonging to his holy people. That this is the true import of the words ακαθαρτα and αγια, will be apparent from the Scriptures, in which the heathen are styled the unclean, in opposition to the Jews, who were in covenant with God, and therefore styled a holy people. Whence it is evident that the Jews looked upon themselves as δουλοι Θεου καθαροι, the clean servants of God, Nehemiah 2:20; and upon all the heathen and their offspring, as unclean, by reason of their want of circumcision, and the sign of the covenant. Hence, whereas it is said that Joshua circumcised the people, chap. 1 Corinthians 5:4, the LXX. say, περιεκαθαρεν, he cleansed them. Moreover, of heathen children, and such as are not circumcised, they say, they are not born in holiness; but they, on the contrary, are styled σπερμα αγιον, a holy seed, Isaiah 6:13; Ezra 9:2; and the offspring from them, and from those proselytes which had embraced their religion, are said to be born in holiness, and so thought fit to be admitted to circumcision, or baptism, or whatsoever might initiate them into the Jewish Church; and therefore to this sense of the words holy and unclean, the apostle may be here most rationally supposed to allude. And though one of the parents be still a heathen, yet is the denomination to be taken from the better, and so their offspring are to be esteemed, not as heathen, that is, unclean, but holy; as all Christians by denomination are. Hence, then, the argument for infant baptism runs thus: ‘If the holy seed among the Jews was therefore to be circumcised, and be made federally holy, by receiving the sign of the covenant, and being admitted into the number of God's holy people, because they were born in sanctity; then, by like reason, the holy seed of Christians ought to be admitted to baptism, and receive the sign of the Christian covenant, the laver of regeneration, and so be entered into the society of the Christian Church.' So also Clemens Alexandrinus and Tertullian.”