I see myself as someone traveling on my journey back to my creator and Father. On earth, I am just passing through, carrying no burdens. If you don't believe that there is a God, then you have no idea where you are going. In other words, you are lost. In this case, you might as well live a completely self-centered life, enjoying life as much as you can and not caring about others, while you are on earth. The fact that atheists are not living like that 100% yet shows that they still have a God-given conscience.