Ephesians 3:5

Which in other ages (rather, to other generations) was not made known unto the sons of men. — For the general sense comp. Colossians 1:27. The phrase “the sons of men” (except that it is once used in Mark 3:28) is peculiar to the Old Testament, where it is of frequent use in the poetical books, and it is notable that in Ezekiel it is the name by which the prophet himself is constantly addressed. Hence, although it is probably wrong to restrict to the children of Israel, or to the prophets, words which by their very nature apply to all mankind, yet the phrase seems to be used with a suggestion of the contrast between the old dispensation and the new. (Comp. our Lord’s words in Matthew 11:11, “Among them that are born of women there hath not risen a greater than John the Baptist: notwithstanding he that is least in the kingdom of heaven is greater than he.”)

As it is now revealed unto his holy apostles and prophets by the Spirit. — The application of the epithet “holy” to the Apostles has been thought strange as coming from one of their number; and it is worth notice that this exceptional application is certainly more appropriate to the comparatively impersonal style of an encyclical epistle. But the epithet (applied to the Old Testament prophets in Luke 1:70; Acts 3:21; 2 Peter 3:2), like the frequent use of it as the substantive “saints,” in application to all Christians, refers not to personal character, but to official call and privilege. In this passage it is clear that it is used thus, in emphatic contrast with “the sons of men” above, and in connection with the following words, “in the Spirit.” The contrast here briefly conveyed is the same which is drawn out in 1 Corinthians 2 between the “wisdom of men,” and the “wisdom of God,” sanctifying, and so enlightening, the Christian soul.