The carnal mind is not simply a mind that thinks about wrong things, it is a mind that has established its own sovereignty as the final criterion for everything. The carnal mind evaluates suffering by asking, why is this happening to me? The carnal mind evaluates success by asking, what have I accomplished? The carnal mind evaluates the other by asking, what can they offer me? The carnal mind is not necessarily a malicious mind, it can even be a religious, disciplined, morally striving mind, the problem is not the intention, it is the center of gravity.
The spiritual mind for its part, is not a mind that only thinks about religious matters or lives in constant prayer without contact with everyday reality, Paul was not describing a mysticism disconnected from practical life. The spiritual mind is one that has learned to interpret reality from a reference that is beyond itself. The spiritual mind reads suffering with the eyes of the promise. The spiritual mind evaluates the present, in light of the eternal. The spiritual mind recognizes in the other, not just a human interlocutor, but someone carrying the weight and dignity of being created in the image of God.
This spiritual mind, Romans 8:6, produces life and peace, two words that Pauline vocabulary are never fleeting feelings, but states of being rooted in an objective reality. What makes this distinction especially uncomfortable, is that it does not divide humanity between good people and bad people, between religious and irreligious, it cuts across the very heart of the believer. The carnal mind does not automatically disappear with conversion, it coexists, resists, tries to regain control in pressure situations, in difficult decisions, in moments when faith seems too abstract to be helpful. The transformation of the mind, Romans 12:2, is an ongoing process, not a one-time event and Romans chapter 8 is the theological foundation upon which this process makes sense.