Be renewed in the spirit of your mind.
When you become a Christian, God gives you a new mind—but you must fill it with new thoughts. A baby is born with a fresh, new mind, and then impressions are made in the baby’s mind that determine the course of his or her life. The same thing is true of a Christian. When you enter into God’s kingdom, you’re given a fresh, new mind. You then need to build the right thoughts into your new mind. That’s why Philippians 4:8 says, “Whatever things are true, whatever things are noble, whatever things are just, whatever things are pure, whatever things are lovely, whatever things are of good report, if there is any virtue and if there is anything praiseworthy—meditate on these things.” We have a renewed mind, not a reprobate mind.
Instead of having a reprobate, vile, lascivious, greedy, unclean mind, we have a mind filled with righteousness and holiness. And that should naturally characterize the way we live.