It absolutely IMPOSSIBLE for a blood-bought child of God to be sold into bondage to sin!
It is not "rhetorical" but a very real possibility. If he identifies with the flesh then he comes back into that condition and has the death sentence (physical) hanging over him.
Romans 8:13 For if ye live after the flesh, ye shall die: but if ye through the Spirit do mortify the deeds of the body, ye shall live.
1 Corinthians 9:27 But I keep under my body, and bring it into subjection: lest that by any means, when I have preached to others, I myself should be a castaway.
We are to walk in the nature of this "new or inner" man.
Ephesians 3
16 That he would grant you, according to the riches of his glory, to be strengthened with might by his Spirit in the inner man;
17 That Christ may dwell in your hearts by faith; that ye, being rooted and grounded in love,
Ephesians 4:24 And that ye put on the new man, which after God is created in righteousness and true holiness.
The "inner man" or "new man" or the one born of the Spirit cannot sin.
John 3:6 That which is born of the flesh is flesh; and that which is born of the Spirit is spirit.
1 John 3
9 Whosoever is born of God doth not commit sin; for his seed remaineth in him: and he cannot sin, because he is born of God.
10 In this the children of God are manifest, and the children of the devil: whosoever doeth not righteousness is not of God, neither he that loveth not his brother.
If and when you leave off following the lead of the Spirit and identify with and behave according to the flesh expect a rebuke (As Peter - get thee behind me Satan) or chastening or even death (as those "servants" commiting fornication in the Thyratira church).
1 Corinthians 11
29 For he that eateth and drinketh unworthily, eateth and drinketh damnation to himself, not discerning the Lord's body.
30 For this cause many are weak and sickly among you, and many sleep.
31 For if we would judge ourselves, we should not be judged.
32 But when we are judged, we are chastened of the Lord,
that we should not be condemned with the world.
If
we wander off into darkness then
we sin.
1 John 1
6 If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth:
7 But if we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanseth us from all sin.
8 If we say that we have no sin, we deceive ourselves, and the truth is not in us.
9 If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.
10 If we say that we have not sinned, we make him a liar, and his word is not in us.
If we wander from the flock He will come for us.
Matthew 18
12 How think ye? if a man have an hundred sheep, and one of them be gone astray, doth he not leave the ninety and nine, and goeth into the mountains, and seeketh that which is gone astray?
To this fact I am a living testimony.
HankD