Arwen: A Christ Like Figure
Disclaimer: the following post is written by an agnostic with absolutely no expertise in theology.
Maybe, it has been appointed so, that by my loss the kingship of Men may be restored. Therefore, though I love you, I say to you: Arwen Undómiel shall not diminish her life's grace for less cause. She shall not be the bride of any Man less than the King of both Gondor and Arnor.
This quote by Elrond always fascinates me. Fate, the will of Erū Ilúvatar, are facts of life in Tolkien's Middle Earth. Elrond's speculation that Arwen was appointed to bring about the restoration of the kingship of Men is highly probable. It puts Elrond's words into a new light, less that unless Aragorn is king, he is not worthy of Arwen, and more, if Aragorn is not king, then there would be no reason for Arwen to give up her immortality. Arwen's purpose is to give up her immortality and reconcile the race of Men to the Valar and Eldar, which is to be accomplished by marrying the King of Men. If Aragorn is not the King of Gondor and Arnor, then marrying him will not accomplish this goal.
Numenor fell, in large part, because it turned towards worship of Melkor, and away from the Valar and the Eldar. The break between Man and elves was a fall from grace from Man, and the flooding of Numenor is reminiscent of the Great Flood and Noah's arc, and the destruction of Sodom and Gomorrah.
Arwen's role was to reunite Man and elf. Her child with Aragorn, Aragorn's heir, is called Eldarion, and he symbolises that reunion.
Arwen's beauty, and her fate, is often paralleled in text with Luthien, so much so that when Aragorn first saw her, he had been singing about Luthien, and cried out Tinuviel as Beren did.
If we consider Arwen predestined for this fate, then Arwen's beauty itself seems something that was given to her for that purpose. She was made beautiful that the one true king of Men would fall for her at first sight, and that the beauty she possesses will create in her mind and the mind of others parallels between herself and Luthien, from whom she inherited the choice to live or die. She was given Luthien's face because she was chosen to have Luthien's fate.
That said, there is a fair deal of significance placed on Arwen choosing to give up her immortality to be with Aragorn, her decision is described as the "choice of Luthien".
This is reminiscent of the passage in Luke 1:38, where Mary accepts that she will have Jesus.
And Mary said, āBehold, I am the handmaid of the Lord; let it be to me according to your word.ā
Arwen as a Madonna figure has already been explored in some degree. Aragorn is the "King of Men", just as Jesus is Biblically considered to be so. However, while Mary heralds Jesus's divinity more than grants it, Jesus is the divine figure, but that he was born to a virgin reveals that divinity, it is Arwen who, descended from the Eldar, is closer to the divine than Aragorn. She is the one whose presence is restoring grace to the Race of Man, and she is the one who is sent to Man to die for them. She, an elf, could have lived an immortal life, but for Man to be redeemed, she has to become immortal, and die.
My theory is that she took this love for Aragorn to be a sign that she was chosen to give up her immortality and make the choice of Luthien, and she agrees to do so as an act of faith to The One. Arwen's contempt for the Numenoreans and how they caused their Fall reveals the depth of her own faith and devotion, and also explains why she would give up her immortality for love, if she believed it to be her appointed duty. Arwen fell in live with Aragorn not on first sight, but on second sight, when she saw his dressed as an Elven King.
"I say to you, King of the NĆŗmenoreans, not till now have I understood the tale of your people and their fall. As wicked fools I scorned them, but I pity them at last. For if this is indeed, as the Eldar say, the gift of the One to Men, it is bitter to receive."
When Aragorn lays down to die, he does so willingly and content, at peace with his life. It is Arwen who begs, who grieves, who rages, who bargains, who mourns his death and, for misery is a death sentence to elves, her own, and while Aragorn's death is peaceful and surrounded by love and comfort, Arwen's is bitter and sorrowful. This is very reminiscent of Jesus's own struggle in the Garden of Gethsemane, and his painful death on the cross.