People who receive their morality will always be living with contradictions - what they have been told and what they have experienced. In addition, if people have a deity and a holy text like the one I had, they are going to struggle with their authority being inconsistent.
I find that non-belief gives me a much clearer playing field and encourages me to engage my ethical code in ways that I did not when I was a believer. When I was a theist, I was concerned with whether or not I was obedient. Now I am concerned with how much help or harm I bring to my world.
