The “carnal Christian” doctrine is a false doctrine. The word for carnal in the Greek is sarkikos and this means having the depraved fleshy unregenerate worldly sin fallen nature.
The scriptures say that WE ARE NOT IN THE FLESH BUT IN THE SPIRIT IF SO BE THAT THE SPIRIT OF GOD DWELLS IN YOU. Romans 8:9
You are either saved or you are not. John says that if we live in sin then we do not have God’s Spirit. Those who live like the devil belong to the devil. A true Christian hates sin and is constantly yielding to the Holy Spirit to transform him/her day by day into the image of Jesus Christ.
The word “back slider” is not in the New Testament at all! Backslider was a word for Israel who could NOT keep the law and fell away from God. Israel was not born again! True Christians are born again.
“The backslidden in heart is filled with his own ways. Proverbs 14:14
This is a hearer of the word but not a doer! The natural heart condition of the unregenerate is one of turning aside from God, backslid from its maker. Like apostate Israel, it is in need of divine intervention in order to be saved Ps. 80: 14-21
“‘If you return, O Israel’, says the Lord, ‘Return to Me; and if you will put away your abominations out of My sight, you shall not be moved’…For thus says the Lord to the men of Judah and Jerusalem: ‘Break up your fallow ground, and do not sow among thorns. Circumcise yourselves to the Lord, and take away the foreskins of your hearts, you men of Judah and inhabitants of Jerusalem, lest My fury come forth like fire, and burn so that no one can quench it, because of the evil of your doings” Jeremiah 4:1-4
The uncircumcised in heart is the unregenerate heart.
. “…they are not all Israel who are Israel” Romans 2:9
“But he is a Jew who is one inwardly, and circumcision is that of the heart, in the Spirit.” Romans 9:6
The unfaithful servants and 5 virgins were not true believers. The 5 virgins had lamps, they had the word of God, they heard the good news but they had no oil. They did not have the Holy Spirit and one must have the Holy Spirit to be saved. These 5 were a part of the apostate church. Those who claimed to be saved but are not . These have the lamp, the letter of the word, but not the Holy Spirit in them
Little children, let no one deceive you. Whoever practices righteousness is righteous, as he is righteous. Whoever makes a practice of sinning is of the devil, for the devil has been sinning from the beginning. The reason the Son of God appeared was to destroy the works of the devil. No one born of God makes a practice of sinning, for God’s seed abides in him, and he cannot keep on sinning because he has been born of God. By this it is evident who are the children of God, and who are the children of the devil: whoever does not practice righteousness is not of God, nor is the one who does not love his brother” 1 John 37: 7-10
“They went out from us, but they were not of us; for if they had been of us they would have continued with us; but they went out that they might be made manifest, that none of them were of us” 1 John 2:19
A true Christian is not like the false disciples who left Jesus because they did not believe he was who he said he was, “…went back and walked with Him no more”
The true Christian says, “Lord, to whom shall we go? You have the words of eternal life. Also we have come to believe and know that you are the Christ, the Son of the living God” John 6:66