I Corinthians 1:17-18, 21, 30-31

For Christ did not send me to baptize, but to preach the gospel, not with wisdom of words, lest the cross of Christ should be made of no effect. For the message of the cross is foolishness to those who are perishing, but to us who are being saved it is the power of God.

For since, in the wisdom of God, the world through wisdom did not know God, it pleased God through the foolishness of the message preached to save those who believe.

But of Him you are in Christ Jesus, who became for us wisdom from God—and righteousness and sanctification and redemption— that, as it is written, “He who glories, let him glory in the LORD.”