'Thinks' in the 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.

But if any man thinks that he is behaving inappropriately toward his virgin, if she is past the flower of her age, and if need so requires, let him do what he desires. He doesn't sin. Let them marry.

But if anyone thinks that he knows anything, he doesn't yet know as he ought to know.

Therefore let him who thinks he stands be careful that he doesn't fall.

If any man thinks himself to be a prophet, or spiritual, let him recognize the things which I write to you, that they are the commandment of the Lord.