And I, brethren, could not speak to you as to spiritual men, but as to men of flesh, as to infants in Christ. I gave you milk to drink, not solid food; for you were not yet able to receive it. Indeed, even now you are not yet able, for you are still fleshly. For since there is jealousy and strife among you, are you not fleshly, and are you not walking like mere men? (1 Cor. 3:1-3, NASB).
It is from this passage that the modern doctrine of the “carnal Christian” has been derived, which promotes the idea that one can be a true Christian but be “carnal,” and thus be behaviorally indistinguishable from unbelievers. The KJV translates 3:3: “For ye are yet carnal: for whereas there is among you envying, and strife, and divisions, are ye not carnal, and walk as men?” We are often told by advocates of this doctrine that we can’t judge those who, although they profess to be Christians, demonstrate no evidence of being born again, because some genuine Christians are “carnal Christians.”