Read 1 Corinthians 2:11 Using Other Translations
For 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.
For who knows a person's thoughts except the spirit of that person, which is in him? So also no one comprehends the thoughts of God except the Spirit of God.
No one can know a person’s thoughts except that person’s own spirit, and no one can know God’s thoughts except God’s own Spirit.