Jesus answered them,
Verily, verily, I say unto you, Whosoever commits sin is the servant of sin.
All Commentaries on John 8:34 Go To John 8
Cyprian of Carthage
AD 258
Nor can a sinful people be a son; but the name of sons is attributed to those to whom remission of sins is granted, and to them immortality is promised anew, in the words of our Lord Himself: "Whosoever committeth sin is the servant of sin. And the servant abideth not in the house for ever, but the son abideth ever."