When a person is getting better they understand more and more clearly the evil that is still left in them. When a person is getting worse they understand their own badness less and less. A moderately bad person knows they are not very good: a thoroughly bad person thinks they are all right. This is common sense, really.
—Mere Christianity, CS Lewis
Related:
your mess, His Message 
Pingback: Weekend faith renewal: something to think about the next time you feel like you’re falling short as a Christian | your mess, His Message