1 Corinthians 2:10-13 (King James Version)

 ¹⁰But God hath revealed them unto us by his Spirit: for the Spirit searcheth all things, yea, the deep things of God.

 ¹¹For what man knoweth the things of a man, save the spirit of man which is in him? even so the things of God knoweth no man, but the Spirit of God.

 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.