The doom of Elves is to be immortal, to love the beauty of the world, to bring it to full flower with their gifts of delicacy and perfection, to last while it lasts, never leaving it even when 'slain', but returning -- and yet, when the Followers come, to teach them, and make way for them, to 'fade' as the Followers grow and absorb the life from which both proceed. The Doom (or Gift) of
Men is mortality, freedom from the circles of the world. Since the point of view of the whole cycle is
Elvish, mortality is not explained mythically: it is a
mystery of
God of which no more is known than that 'what God has purposed for Men is hidden': a grief and an envy to the immortal Elves.