"The Law, then, as it was our tutor, and we were kept shut up under it, is not the adversary but the fellow-worker of grace. But if when grace is come it continues to hold us down, it becomes an adversary; for if it confines those who ought to go forward to grace, then it is the destruction of our salvation. If a candle which gave light by night kept us, when it became day, from the sun, it would not only not benefit, it would injure us. And so does the Law, if it stands between us and greater benefits. Those then are the greatest traducers of the Law who still keep it, just as the tutor makes a youth ridiculous by retaining him with himself when time calls for his departure."
-Commentary on Galatians 3:25-26