Sad? No, it's wonderful, a true marvel. We as individuals are here for a mindnumbingly short space of time, and yet in that time we manage to learn, to form attachments, to discover ever more about the universe, to pass on knowledge to the next generation and most of all have the chance to make a difference to the world we live in, and the world we leave behind.
If our civilisation is one day wiped out by an asteroid, we'll still have been here and we'll still have achieved everything we've done thus far. It's quite likely that some life (cockroaches?) would continue on Earth, and although it would be fascinating to observe what would happen, we won't be here to see it so we have lost nothing.
If, in the distant future, another civilisation arises, it wouldn't be the same and they may dig up remnants of our civilisation and marvel at what we did. On the other hand, they might not. It won't matter to us and it won't matter to the universe.
So yes, we come, live, love and die and that's it, and it's flippin' amazing. It's the absolute pinnacle of existence, and every moment of it should be treasured. We are so incredibly lucky just to be here.
What we do while we're getting on with life, that's what makes the whole thing so much more fascinating than any tales of reincarnation or spirits. Making a positive difference to the world grants a person more immortality than any amount of ghosts. When I die, I want to live again only in the memory and love and appreciation of the people I cared for and who cared for me, and those whose lives I touched for good. I want to leave the world a better place, not hang around it forever.
And, erm *steps off soapbox*, read up on the ideomotor effect.
I am sorry if you felt I was having a go at your spelling, I will endeavour to do so more politely if the need arises in the future. I was trying to be helpful.