Paul said it in Romans 7: "I don’t understand what I do. I don’t do what I want to do. Instead, I do what I hate to do. I do what I don’t want to do...What a terrible failure I am! Who will save me from this sin that brings death to my body? I give thanks to God. He will do it through Jesus Christ our Lord."
And one other thing he said -- in God... when I am weak, the I am strong... oh, it's in Corinthians -- "My grace is enough; it’s all you need. My strength comes into its own in your weakness... It was a case of Christ’s strength moving in on my weakness...I just let Christ take over! And so the weaker I get, the stronger I become."
all these pictures via pinterest. that last one right there = awesome.