But an unspiritual person does not accept the things of the Spirit of God. He thinks they are foolish, and he cannot know them because one must have the Spirit to judge them correctly. (GWN)
The natural person does not accept the things of the Spirit of God, for they are folly to him, and he is not able to understand them because they are spiritually discerned. (ESV)
But the natural man does not receive the things of the Spirit of God, for they are foolishness to him; nor can he know them, because they are spiritually discerned. (NKJV)