1 Corinthians 2:10-12 NIV

[10] these are the things God has revealed to us by his Spirit. The Spirit searches all things, even the deep things of God. [11] For who knows a person’s thoughts except their own spirit within them? In the same way no one knows the thoughts of God except the Spirit of God. [12] What we have received is not the spirit of the world, but the Spirit who is from God, so that we may understand what God has freely given us.