I find it comforting to know that someone who has been suffering is no longer suffering. I find it comforting to know that those I've lost aren't aware of the loss, I may be missing family and friends that have died, but they aren't sad and missing me. I find it comforting to know that once I die, I won't know I'm dead.
I don't want to die, and feel sad there are people I'll never see again. I think it's sad that awareness/consciousness comes with the price of knowing it will end some day. But, just the same, I'm glad to have had the chance to live, to appreciate the universe and the wonder of living, even if it's temporary.