1 Corinthians 2:16 YLT

¹⁴  and the natural man doth not receive the things of the Spirit of God, for to him they are foolishness, and he is not able to know 'them', because spiritually they are discerned;

¹⁵  and he who is spiritual, doth discern indeed all things, and he himself is by no one discerned;

¹⁶  for who did know the mind of the Lord that he shall instruct Him? and we -- we have the mind of Christ.