But thanks be to God, that, whereas ye were servants of sin, ye became obedient from the heart to that form of teaching whereunto ye were delivered;

But thanks be to God that, though you once were slaves to sin, you wholeheartedly obeyed the form of teaching to which you were committed.

and thanks to God, that ye were servants of the sin, and--were obedient from the heart to the form of teaching to which ye were delivered up;

But thanks [be] toGod, that ye were bondmen of sin, but have obeyed from the heart the form of teaching into which ye were instructed.