Augustine of Hippo

Why, if the law is good, is it the power of sin? Because sin wrought death by that which is good, that it might become exceedingly sinful, that is, might acquire greater powers by becoming also transgression. Why, if the law is good, are we "dead to the law by the body of Christ"? Because we are dead to the law's condemnation, being set free from the disposition which the law condemned and punishes.… So the same precept, which is law to those who fear it, is grace to those who love it.