Ephesians 4:17,20-24
So I tell you this, and insist on it in the Lord, that you must no longer live as the Gentiles do, in the futility of their thinking.
You, however, did not come to know Christ that way. Surely you heard of Him and were taught in Him in accordance with the Truth that is in Christ Jesus. You were taught, with regard to your former way of life, to put off your old self, which is being corrupted by its deceitful desires; to be made new in the attitude of your minds; and to put on the new self, created to be like God in true righteousness and holiness.
This is essential. Paul insists in the Lord, that we, as Christians, no longer live our lives by our own thought processes, and our desires for earthly things and pleasures. These are all of our physical flesh and the thinking in our own minds. Our earthly desires are corrupting us, as food left out becomes rancid, spoiled. Real life is not physical, but spiritual. And God's thoughts of us and His words are also spiritual.
So we are to train ourselves to think His thoughts, instead of our own; to see through His eyes, not our own; to live our lives in His righteousness, not carnality. Put off the old, carnal self, and put on that new self, that God has made for us, spiritual life that is pure, separate from the world, and just right for each of us.
Even so, come, Lord Jesus!
