do what you will.14 The doing of an action is not the problem, but the root of the doing. Of course, it must be in obedience to the law, since sin is an ethical–spiritual matter. But, as Paul says, “If I give away all I have, and if I deliver up my body to be burned, but have not love, I gain nothing” (1 Cor. 13:3). Sin is a mystery that we cannot understand but that we must acknowledge. Bavinck’s words are moving yet terrifying: We know neither whence it is nor what it is. It exists,