In Romans 8:1-9 there is a division stated, but it is not between carnal and spiritual Christians. It is a division between those who walk after the flesh (the unregenerate) and those who walk after the Spirit (they that are Christ’s). There is no third category. Again, in Galatians 5:17-24 we have only two classes or categories – those that do the works of the flesh and those that are led by the Spirit. There is no third or fourth class or group.