I am speaking in human terms, because of your natural limitations. For just as you once presented your members as slaves to impurity and to lawlessness leading to more lawlessness, so now present your members as slaves to righteousness leading to sanctification.
19. I speak what is human, etc. He says that he speaks after the manner of men, not as to the substance but as to the manner. So Christ says, in John 3:12, that he announced earthly things, while yet he spoke of heavenly mysteries, though not so magnificently as the dignity of the things required, because he accommodated himself to the capacities of a people ignorant and simple.
To use the doctrine of grace as license for sin is to abuse it utterly and reject it with abhorrence. Any opinion that opens a door to practical immorality, however plausible its appeal to free grace, contradicts the truth as it is in Jesus. Sanctification consists in two things: mortification, dying to sin, and vivification, living to righteousness.
AI summary
Commenting on Romans 6:1-23
I speak after the manner of men,.... This refers either to what the apostle had said already concerning service and liberty, things which were known among men, and easy to be understood; or to the following exhortation: what he was about to say, he delivered in a manner suited to their understandings, and was "that which was human"; not angelic, or what required the power...