English Standard Version
But thanks be to God, that you who were once slaves of sin have become obedient from the heart to the standard of teaching to which you were committed,New International Version
But thanks be to God that, though you used to be slaves to sin, you wholeheartedly obeyed the form of teaching to which you were entrusted.Catholic Public Domain Version
But thanks be to God that, though you used to be the servants of sin, now you have been obedient from the heart to the very form of the doctrine into which you have been received