I would like to resolve the seemingly paradoxical phenomenon that atheists are often the most moral people you'll ever meet.
I am an atheist, but I have moral ideals for how society should function. The one I consider most fundamental is the assumption that the same moral ideals should apply to all humans.
Since I want society to function well, I make an effort to embody the same ideals I expect in others. I don't believe there is a "higher" meaning to life, I think we humans create our own. Improving society is a pursuit that I find worthwhile to pursue on this earth, and as a result I feel good about myself when I do my part by being a good person.
One interesting thing to consider is that it's always the religious people who accuse the atheists of not having real morals. But the reality is, when an atheist like me decides to act morally, it is out of pure idealism. When a religious person acts morally, they expect to get a reward from it -- heaven, karma, a better relationship with God, whatever.
So, it is really the atheists who have the upper hand on the morality issue!