'Foolishness' in the Bible

For the word of the cross is foolishness to those who are dying, but to us who are saved it is the power of God.

For seeing that in the wisdom of God, the world through its wisdom didn't know God, it was God's good pleasure through the foolishness of the preaching to save those who believe.

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

Because the foolishness of God is wiser than men, and the weakness of God is stronger than men.

Now the natural man doesn't receive the things of God's Spirit, for they are foolishness to him, and he can't know them, because they are spiritually discerned.

For the wisdom of this world is foolishness with God. For it is written, "He has taken the wise in their craftiness."