1 Corinthians 2:15-16

But the spiritual man [the spiritually mature Christian] judges all things [questions, examines and applies what the Holy Spirit reveals], yet is himself judged by no one [the unbeliever cannot judge and understand the believer’s spiritual nature]. For WHO HAS KNOWN THE MIND and PURPOSES OF THE LORD, SO AS TO INSTRUCT HIM? But we have the mind of Christ [to be guided by His thoughts and purposes]. [Is 40:13]