Every man who committeth sin is the slave of sin. This is an argument drawn from contrary things. They boasted that they were free. He proves that they are the slaves of sin, because, being enslaved by the desires of the flesh, they continually sin. It is astonishing that men are not convinced by their own experience, so that, laying aside their pride, they may learn to be humble. And it is a very frequent occurrence in the present day, that, the greater the load of vices by which a man is weighed down, the more fiercely does he utter unmeaning words in extolling free-will. Christ appears to say nothing more here than what was formerly said by philosophers, that they who are devoted to their lusts are subject to the most degrading slavery. But there is a deeper and more hidden meaning; for he does not argue what evil men bring on themselves, but what is the condition of human nature. The philosophers thought that any man is a slave by his own choice, and that by the same choice he returns to freedom. But here Christ maintains, that all who are not delivered by him are in a state of slavery, and that all who derive the contagion of sin from corrupted nature are slaves from their birth. We must attend to the comparison between grace and nature, on which Christ here dwells; from which it may be easily seen that men are destitute of freedom, unless they regain it from some other quarter. Yet this slavery is voluntary, so that they who necessarily sin are not compelled to sin.

Whosoever committeth sin - In this passage Jesus shows them that he did not refer to political bondage, but to the slavery of the soul to evil passions and desires.
Is the servant - Is the slave of sin. He is bound to it as a slave is to his master.

Whosoever committeth sin is the servant of sin - Or, δουλος εστι, etc., is the slave of sin. This was the slavery of which Christ spoke; and deliverance from it, was the liberty which he promised.

Jesus answered them, verily verily I say unto you,.... Taking no notice of their civil liberty, to which he could easily have replied to their confusion and silence, he observes to them their moral servitude and bondage, and in the strongest manner affirms, that
whosoever committeth sin, is the servant of sin; which must be understood, not of one that commits a single act of sin, though ever so gross, as did Noah, Lot, David, Peter, and others, who yet were not the servants of sin; or of such who sin through ignorance, weakness of the flesh, and the power of Satan's temptations, and especially who commit sin with reluctance, the spirit lusting against it; nor indeed of any regenerate persons, though they are not without sin; nor do they live without the commission of it, in thought, word, or deed; and though they fall into it, they do not continue and live in it, but rise up out of it, through the grace of God, and by true repentance; and so are not to be reckoned the servants of sin, or to be of the devil. But this is to be understood of such whose bias and bent of their minds are to sin; who give up themselves unto it, and sell themselves to work wickedness; who make sin their trade, business, and employment, and are properly workers of it, and take delight and pleasure in it: these, whatever liberty, they promise themselves, are the servants of corruption; they are under the government of sin, that has dominion over them; and they obey it in the lusts thereof, and are drudges and slaves unto it, and will have no other wages at last but death, even eternal death, if grace prevent not; see Romans 6:16.

Whosoever committeth sin--that is, liveth in the commission of it--(Compare 1-John 3:8; Matthew 7:23).
is the servant of sin--that is, the bond-servant, or slave of it; for the question is not about free service, but who are in bondage. (Compare 2-Peter 2:19; Revelation 6:16). The great truth here expressed was not unknown to heathen moralists; but it was applied only to vice, for they were total strangers to what in revealed religion is called sin. The thought of slaves and freemen in the house suggests to our Lord a wider idea.

Whosoever committeth sin is the servant of sin. According to his custom, Christ makes no direct argument in reply, but states a truth and leaves them to apply it. The sinner is the slave of sin. See Romans. 7:9-24.

Jesus answered - Each branch of their objection, first concerning freedom, then concerning their being Abraham's offspring, John 8:37, &c. He that committeth sin, is, in fact, the slave of sin.