But, as it is written, “What no eye has seen, nor ear heard, nor the heart of man conceived, what God has prepared for those who love him,” God has revealed to us through the Spirit. For the Spirit searches everything, even the depths of God. For what person knows a man’s thoughts except the spirit of the man which is in him? So also no one comprehends the thoughts of God except the Spirit of God. Now we have received not the spirit of the world, but the Spirit which is from God, that we might understand the gifts bestowed on us by God. And we impart this in words not taught by human wisdom but taught by the Spirit, interpreting spiritual truths to those who possess the Spirit.
–1 Corinthians 2:9-13