1 Corinthians 2:12-16

12Now we have received, not the spirit of the world, but the spirit which is of God; that we might know the things that are freely given to us of God. 13Which things also we speak, not in the words which man’s wisdom teacheth, but which the Holy Ghost teacheth; comparing spiritual things with spiritual.

14But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned. 15But he that is spiritual judgeth all things, yet he himself is judged of no man. 16For who hath known the mind of the Lord, that he may instruct him? But we have the mind of Christ.