World Wide Study Bible
a Bible passage
21. after that—rather, "whereas."
in the wisdom of God—in the wise arrangement of God.
knew not God—whatever other knowledge it attained (Ac 17:23, 27). The deistic theory that man can by the light of nature discover his duty to God, is disproved by the fact that man has never discovered it without revelation. All the stars and moon cannot make it day; that is the prerogative of the sun. Nor can nature's highest gifts make the moral day arise; that is the office of Christ. Even the Jew missed this knowledge, in so far as he followed after mere carnal world wisdom.
it pleased God—Paul refers to Jesus' words (Lu 10:21).
by the foolishness of preaching—by that preaching which the world (unbelieving Jews and Gentiles alike) deem foolishness.
save them that believe—(Ro 1:16).