Cleanliness

I was reading something in Proverbs today that talked about how we are pure in our own eyes. I think this happens a lot in my own Christian life. I compare my life to that of non-christians and say look how much cleaner I am than them. Well duh that doesn't do me much good. I rarely compare myself to Christ because I know what the outcome will be, but then again isn't that the goal. I remember Dr. Long talking about being like Christ. He brought up the point if our goal is to be like Christ then why don't we think we can reach it. After all God said we can do all things through him who strengthens us. Do we doubt the power of God or do we doubt ourselves?