Fascinating thread to read in its own right, especially the commentary about the characters of Galadriel and Celeborn.
About Celeborn, who is described as the wisest of the Elves of Middle-earth, I have no deep commentary to offer, only the jesting suggestion that maybe Galadriel is offering a joke herself--that wisdom in a husband is listening to her wife.
Actually, while I have no conclusions to offer, I do wonder about Celeborn the Wise, both in light of the contrast with Galadriel here and in the light of his eventual decision not to take to the ships with her immediately. Is her statement here a form of prophecy: Celeborn
will be the wisest Elf in Middle-earth once everyone else leaves? Certainly, by contrast with the other Elf-kings he shares an archetype with (Thingol, Thranduil especially), he comes across quite positively. He also may lack the keen insight of Galadriel, but there's also a sense that he lacks her closeness to temptation--we never see him desiring the Ring, and it certainly seems that the realm-seeking he shares with Galadriel was HER desire, rather than his.
As to Galadriel... well, I *do* have some thoughts there, specifically about her relationship with the Blessed Virgin Mary.
The basics of my thought here is that Mary should only be considered PART of the influence on Galadriel--and I don't think it was the first influence. The approach of the plot into Lórien is very much modelled on adventures into Fäerie ("it IS perilous," as Aragorn affirms) and Galadriel seems to start as a type of the Fäerie Queen--like the Lady in Sir Gawain and the Green Knight, she is a test for the hero(es).
This test culminates in the Mirror scene, where Tolkien brilliantly turns her from an impassive Lady to a character in her own right by being tested herself. This is suggested, I think, by the Ring. The Ring *must* be sent to the Fires, it can't be offered to someone More Pure (TM) than Frodo, and it is Pure Evil--it tests even Gandalf. Once this thought occurs to Tolkien, Galadriel becomes the most fascinating Elf in
The Lord of the Rings--approriately enough, she becomes truly First Age in her complexity.
I think it is only after she passes this test (an abegnation of her own will that DOES recall, in a more melancholy way, Mary's Fiat) that Tolkien starts to associate her with the Virgin Mary. The gift-giving is a traditional element brought in from other literature, but the gift of lembas is one that even Tolkien admits has Eucharistic influences--and once you have a queen gifting you the Eucharist, you definitely have a Marian figure.
This also explains, if it has any validity, why Galadriel's backstory seems to become purer and holier as Tolkien's life goes on: he's remembering the post-mirror Galadriel more and more, the Galadriel who continues to be an important figure in the story for Frodo and Sam--and the others--obscuring ever more the pre-Mirror Lady of the Wood. The thunder-clap in the middle, however, is the true genius--and the reason Galadriel gets grafted onto the House of Finwë.