1 Corinthians 2:10b-14

The Spirit searches all things, even the deep things of God. For who can know a person's thoughts except the spirit of that person, which is in him? In the same way - no one can comprehend the thoughts of God except the Spirit of God. You see, we were not given the spirit of the world, but the Spirit who is from God, that we may understand what God has freely given us. And we tell you this, not in words from human wisdom, but in words taught by the Spirit. We explain spiritual truths with the Spirit's words. A man without the Spirit does not know the truths that come from the Spirit of God, for they are foolishness to him, and he cannot understand them because they are spiritually discerned.