“For after that in the wisdom of God the world by wisdom knew not God, it pleased God by the foolishness of preaching to save them that believe.”
King James Version (KJV)
1:21 For since in the wisdom of God - According to his wise disposals, leaving them to make the trial. The world - Whether Jewish or gentile, by all its boasted wisdom knew not God - Though the whole creation declared its Creator, and though he declared himself by all the prophets; it pleased God, by a way which those who perish count mere foolishness, to save them that believe.
1Co 1:21 For . . . the world by wisdom knew not God. Worldly wisdom did not search out the true God. Intellectual speculation had done its utmost, and failed. Hence it was rejected, and the Divine Wisdom chose by the foolishness of preaching to save them that believe. That is, by preaching what the wise and puffed up of the this world called foolishness. They called the gospel foolishness.