"There are many dualities in the worlds, within worlds, and between worlds. If people discovered their
dualities, there would be greater understanding in all worlds. this is the essence of true magic, completing the circle which
binds us together. It is a magic concieved of love."
~ Arwen Undomiel
"I in them, and thou in me, that they may be made perfect in one."
Jesus, in John 17:23
Arwen gave up immortality on the physical plane of her world, simply out of love. It reminded me of
the story of Quan Yin in Buddhist tradition, which is very similar:
"Legend says Kuan Yin, originally a princess, having forsaken marraige, lived her life in a convent
much to her fathers anger and disgust. She was a Buddhist Bodhisattva (a mortal who has achieved enlightenment and earned
the right to enter heaven or Nirvana), and when at the gates of heaven, she heard someone on Earth cry and so turned back,
vowing that she would stay on Earth to do all she could to ease our suffering. She would not enter Heaven until everyone could
go there with her."
~ By: Lisa Scott, Isisdownunder
These "dualities" as Arwen calls them, in humans & Elves, seem to eminate from the same love Jesus
had, who also gave up his immortality in the physical realm in order to help others.