3 They heard what they ought; but they did not what they ought. What did they hear? Because I said, “The truth shall free you;” ye turned your thoughts upon yourselves, that you are not in bondage to man, and you said, “We were never in bondage to any man. Every one,” Jew and Greek, rich and poor, the man in authority and private station, the emperor and the beggar, “Every one that commits sin is the servant of sin.” “Every one,” says He, “that commits sin is the servant of sin.”
If men but acknowledge their bondage, they will see from whence they may obtain freedom. Some free-born man has been taken captive by the barbarians, from a free man is made a slave; another hears, and pities him, considers how that he has money, becomes his ransomer, goes to the barbarians, gives money, ransoms the man. And he has indeed restored freedom, if he have taken away iniquity. But what man has ever taken away iniquity from another man? He who was in bondage with the barbarians, has been redeemed by his ransomer; and great difference there is between the ransomer and the ransomed; yet haply are they fellow-slaves under the lordship of iniquity.
I ask him that was ransomed, “Have you sin?” “I have,” he says. I ask the ransomer, “Have you sin?” “I have,” he says. So then neither do you boast yourself that you have been ransomed, nor you uplift yourself that you are his ransomer; but fly both of you to the True Deliverer. It is but a small part of it, that they who are under sin, are called servants; they are even called dead; what a man is afraid of captivity bringing upon him, iniquity has brought on him already. For what? Because they seem to be alive, was He then mistaken who said, “Let the dead bury their dead”? So then all under sin are dead, dead servants, dead in their service, servants in their death.
Source: Sermons on Selected Lessons of the New Testament (New Advent)