We would all like to think that no one knows our hearts better than we do. We would like to believe that others may be self-deceived, but we are not. It’s simply not true. Since sin is in its essence deceptive, as long as sin lives in our hearts, we will tend to be blind to the true condition of our hearts. But more must be said. Not only will we be blind to our hearts; we will be blind to our blindness, thinking we see when we really don’t. To add to this, we will participate in our own blindness. Because of self-righteousness of sin, we will work to make ourselves feel good about what is not good or believe that the problem is not, in fact, us.
(HT: Tim Brister)