Tim Keller | March 17, 1996
The Bible says human hearts are sinful, but beyond that we’re slaves to sin. The Bible says sin is not just an action; it’s a power. Every sinful action has a destructive power upon the faculty that put that action forth.
In other words, when you sin with the mind, that sin shrivels the rationality. When you sin with the emotions, that sin shrivels the emotions. When you sin with the will, that sin destroys and dissolves your willpower and your self-control. Sin is the destructive action of the self against itself. Sin destroys freedom. Sin is an enslaving power. It shrivels us up.