How the non ageing and long living ( but not by any means immortal ) Elves perceived the ageing and the morality of the other beings of Middle Earth? This is a question that came to my mind several times while I was re reading the Silmarillion. Well ... I got the answer to this query recently. Exactly as we perceive the life expectancy of our pets. We live ten times longer than the majority of them is expected to live, we know that that they will ( probably ) die before we do so, we see them ageing and we accept this as something inevitable, a part of their nature but not without grieving for their loss. But then it came to my mind another question for which I'd like to know your opinion. What sort of philosophical system would might be that, that would be able to support spiritually and emotionally beings like Elves, that can't age and die naturally ( but they know that they can be killed) in order to be able to bare not only the vast length of their lives in a world that other beings are born and pass away, but also to deal with the sorrow that this would bring to them accumulatively in time?