1 Corinthians 3:18 in the World English Bible
Let no one deceive himself. If anyone thinks that he is wise among you in this world, let him become a fool that he may become wise.
Context
17 If any man defile the temple of God, him shall God destroy; for the temple of God is holy, which temple ye are.
18 Let no man deceive himself. If any man among you seemeth to be wise in this world, let him become a fool, that he may be wise.
19 For the wisdom of this world is foolishness with God. For it is written, He taketh the wise in their own craftiness.