Whereas the Lady Arwen Chose a Temporary Mortal Life (of Human Love & Offspring) Over Joining Her Own People, the Elves, in Their Journey from This Life into the Undying Lands (To Evermore Enjoy Life Eternal)
As One well put it: What is a (hu)man profited if s/he gain the whole world but [ultimately] lose their own soul? (Though this blogger well appreciates that that may not have been in Tolkien's mind when thus characterizing Arwen, much less upon the mind or in the thoughts of his cinematic adapters Peter Jackson, Fran Walsh and Philippa Boyens.)