An Atheist loves himself and his fellow man instead of a god. An Atheist accepts that heaven is something for which we should work now – here on earth – for all men together to enjoy. An Atheist accepts that he can get no help through prayer, but that he must find in himself the inner conviction and strength to meet life, to grapple with it, to subdue it and to enjoy it. An Atheist accepts that only in a knowledge of himself and a knowledge of his fellow man can he find the understanding that will help lead to a life of fulfillment.
That right there is selfish. As an atheists, my main concern is leaving this world a better place than I found it. Especially because there is absolutely zero evidence what so ever that there is anything after I die. Sure, I'd love to find that I am wrong in some way, but let's face it, it's just a natural reaction to the fear of the unknown and non-existence. So while I am here, I figure it's important for me to do what needs to be done. I won't have a chance when I am dead. Besides, has anyone ever seen anyone from the dead have an actual effect on anything that was driven by sentience? Ever? Of course not. They are dead! The most that they are doing is decomposing, and perhaps affecting the memories of those around them. But there is absolutely no sentient guidance or any sort of spirit. Throughout all of human history, and all scientific endeavours, there is no proof of this. That right there is a hit. If you want to have an impact on the world, do it while you are here. That is the only thing that you will actually be remembered for.
So that's why I think that the entire idea of heaven is a selfish idea. I would rather actually DO something that is of real, and actual, good in this world. How about you?