if someone actually believes that they are a True Christian and can choose to remain in the works of the flesh,
according to 'the old man', without 'repentance',
we say, read and study, for the Bible tells us believers otherwise...
1COR. 6:9.
Know you not that the unrighteous shall not inherit The Kingdom of God? Be not deceived:
neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor abusers of themselves with mankind,
10.
Nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners, shall inherit the kingdom of God.
18.
Flee fornication. Every sin that a man does is without the body; but he that commits fornication sins against his own body.
19.
What? know you not that your body is the temple of The Holy Ghost which is in you, which you have of God,
and you are not your own?
20.
For you are bought with a price: therefore glorify God in your body, and in your spirit, which are God's.
11PETER 2:20.
For if after they have 'escaped' the pollutions of the world through the knowledge of The Lord and Saviour Jesus Christ,
they are again entangled therein, and overcome, the latter end is worse with them than the beginning.
21.
For it had been better for them not to have known (the way of righteousness), than, after they have known it,
'to turn from The Holy Commandment delivered unto them'.
22.
But it is happened unto them according to the true proverb, The dog is turned to his own vomit again;
and the sow that was washed to her wallowing in the mire.
these Scriptures are speaking to 'believers'...