1 Corinthians 2:9-14

but as it is written, Things which eye saw not, and ear heard not, And which entered not into the heart of man, Whatsoever things God prepared for them that love him. But unto us God revealed them through the Spirit: for the Spirit searcheth all things, yea, the deep things of God. For who among men knoweth the things of a man, save the spirit of the man, which is in him? even so the things of God none knoweth, save the Spirit of God. But we 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 by God. Which things also we speak, not in words which man's wisdom teacheth, but which the Spirit teacheth; comparing spiritual things with spiritual. Now the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him; and he cannot know them, because they are spiritually judged.