Deep in the heart of each one of us is the proud desire to prove ourselves. Sin is wanting to live our lives our way without God. The terrible irony is that we even want to overcome sin our own way without God…this means we need to repent not only of our sin, but also of our ‘righteousness’ when we think of it as our righteousness, which we do to prove ourselves and which we think makes us better than other people.
— Tim Chester, You Can Change, 50-51