John 17:3.   And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent. 1 Cor 1:21.   For after that in the wisdom of God the world by wisdom knew not God, it pleased God by the foolishness of preaching to save them that believe. 1 Cor 2:13-14.   Which things also we speak, not in the words which man's wisdom teacheth, but which the Holy Ghost teacheth; comparing spiritual things with spiritual. But 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.