I Corinthians 1:18, 21, 23

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 we preach Christ crucified, to the Jews a stumbling block and to the Greeks foolishness