he says that they have given him the gift of long life and now he gives it back freely. as to the half elf thing when she chose to become mortal and stay in the world when her father,elrond, went into the west she became mortal and subject to their fate and left middle-earth forever when she died. that is why it was a parting that was so sad and bitter.
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All that is gold does not glitter,
Not all that wander are lost;
The old that is strong does not wither,
Deep roots are not reached by the frost.
From the ashes a fire shall be woken,
A light from the shadows shall spring;
Renewed shall be blade that was broken,
The crownless again shall be king.
Bilbo Baggins Describing Aragorn Son of Arathorn Heir of Elendil,Elessar-Elfstone of his people
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