But if these terms are the truth (I'm just saying for the sake of argument, if they are), then we have no other alternative but to look at them and accept them, to come to terms with them.

It's all about how one chooses to look at things. I see nothing sad about eternal sleep. To me a spirit is what lives on in other people. I find myself sometimes doing or saying things and, after a moment's reflection, I say to myself "Wow, that's totally what my dad would say". That's his spirit (though he's still alive today, thankfully). I could elaborate on this idealogy but in brief, I think it's a beautiful, far from sad approach to life. Naturally we all have our own chosen paths but I don't see mine as any more wrong than yours or some tribesman in the Amazon rain forest.

Because the notion of atheism is often met with anger by christians, citing that it is amoral, I can't help but wonder, just for the sake of hypothesizing: what would you do if you found out your religion was false and that your life now is the only thing that matters, that there was no afterlife? How would you live your life from that moment onward? Would you run around madly and commit savage acts because "nothing matters", or would you try to make every moment the most meaningful and profound moment of your life? I prefer the latter of the two choices.