(This is a repost of a comment I left on the OP. I finally found out how to actually respond to an idea instead of simply leaving a comment. Hopefully this will help me keep better track of people who in return respond to me.)
We all feel pain in some way correct? And we understand that others feel and experience the world in much the same way as we do. So morality is the understanding of equality, the understanding that others can suffer just as we do. So a moral action is one that alleviates suffering. An immoral action is one that leads to suffering. It all works quite well without religion I think. Let me know what you think.