Why is an unsaved person called carnal, and how is that different from believers Paul calls babes in 1 Corinthians?

Les explains that in 1 Corinthians the word carnal speaks of believers who have not really come out of the fleshly experience and are still under the control of the Old Adam rather than the Holy Spirit. That differs from Romans 8, where Paul uses carnal for the unsaved individual, who is carnal because he is still of the flesh. In 1 Corinthians, however, Paul is speaking of believers who are saved and in Christ, but are still so weak spiritually that he calls them babes. He fed them with milk, an analogy from human infancy, because a newborn cannot take solid food and a believer must likewise start with milk. Les says he has patience with new believers and does not expect them to suddenly comprehend all the deep things of God's Word; instead, he looks for growth, teaching that God expects growth from His children. The Corinthians troubled Paul because they were still so steeped in the flesh, yet he still calls them believers—born again and placed into the Body of Christ—though still fleshly minded.