Immortality

This is a very interesting topic. Has anyone heared of a writer called Isobelle Carmody? I've read all her books. In a number of stories she talks about immortality. In one story "long live the giant", it tells about these fairies that live forever, but their wings are torn and useless because they had lost the will to live and to fly but they couldn't die.
Another story was set in the future and people had medicine that could make them live forever. Everyone was dull and sad execpt for one boy who had an incurible disease.
I think the elves in middle earth were sad because they knew so much and experienced so much and stuff. And maybe they sometimes got sick of life but could not die.