The mind of Christ is what belongs to the saint as a new man. The Spirit of God first quickens, and then gives the mind of Christ, to mind the things above, as quickened out of the system of this world. He has the intelligence of Christ, through the Holy Spirit and the Word. It is the communicated mind of God as it has formed itself in His purposes of Christ.
When taught of God, we shall find proportion in truth; it will find its place. Where this is not the case, persons will overstate or wrongly apply truth, and find it will not work. Then, in place of judging themselves, they will judge the truth, and make no progress.
Error in judgment is connected with wrongness of affection. If a person says, I cannot see, then his eye is not single; he cannot justify himself before God. “If thine eye be single, thy whole body shall be full of light.” Whenever we walk in conscience before God, we shall find our path simple: having the mind of Christ, things are as clear as day.
Bible Treasury