I'm not as upset by the statement that the OP clearly has a belief in an afterlife, as anyone and everyone is entitled to their beliefs of the unknown (I tend to go for the less wimsical).
I actually don't believe in an afterlife, I just think its likely.
I am more upset by the assumption that the idea of no afterlife is "pitiful" and "a defeatist, hopeless belief." I don't believe this at all. I find great beauty in my view of life and the world. Think of it this way. If there's no afterlife, no previous life, and no God, then the way we are is just emergence of reality. Our existence is merely the rearangement of current matter, atoms, etc. (however you want to go about it) forming a being that is able to be aware of the beauty around it for a moment, a glimpse at the world, only to then demerge back into the very vat of stuff that is this universe. It's like a wave forming in the ocean with enough force to rub against the side of a whale and then disolve back into the depths. Or a flower blooming to interact with a bee only to shrivel and go back to the earth that it came from. There's something incredibly beautiful and poetic about that. I don't find it hopeless or pitiful. It gives us more reason to focus on NOW, and I don't mean now as in, "Right now I'm at work and this blows." I mean right NOW as in this very instant. Not the instant before nor the next instant. Your mind is focused on the beauty of right now and the feelings your body is experiencing.
I give you credit for reading 10 pages, thats a lot of reading. If you had read all the posts you would have seen that I agree with you that the perspective you mention is a good one. I didn't include it in the OP because I wanted to stir the pot a bit
But Im not sure that anyone actually embraces this perspective fully. I think for some (most? maybe all?) of these people the weight of impending and permanent doom can and
does cause some degree of stress, at one time or another, or quite frequently. I do pity these people, because I think their faith in permanent death makes their life bleak in a way,
even if they do try to look at it from the perspective you mentioned.
The idea of permanent death certainly is hopeless. Theres no question about that. To conclude that this life is all we have leaves no room for hope.
An afterlife in my mind is more defeatist. It means you're giving up on now. "This life, this moment isn't good enough. There HAS to be something next."
I disagree with this. If it does turn out the there is an afterlife - lets say an infinite number of them - then that would simply be a fact of reality. The context of life would be changed. There would be nothing defeatist about it, because you would know that there is more life to come even after death. I don't see how this would cause a person to be giving up on the now. I don't see how it would make someone think this moment isn't good enough. Good enough for what? You would simply go on living, doing whatever it is you decide to do, and being comforted by the fact that the moment you are living in is but one step in an infinite journey.
Depending on who you are, this knowledge may very well compel you to improve yourself. On the other hand, some people who think that this life is all we have may live a selfish life because they want to spend every dollar on themselves. In both cases, I think it depends on who we are and how we decide to live our lives. Someone who knows that there will be an afterlife may live a selfish life too, because they may look at life from the perspective of eternal life and say that it doesn't really matter what happens in a brief 80 years on earth. In any case, it comes down to the individual and who they are, how they think, what they want, regardless of whether or not they are living in the context of eternal life or just one life.