I am far from the first person to think of this, but I feel like I just need to take all my fic titles for the rest of ever from that one quote of Legolas's about time and mortality as the Fellowship rows down the river:
Oh, and also this interchange on memory, from just as they leave Lothlorien-- I know at least one fic that has used a quote as a title:
For all your angsty-fic needs.
'Nay, time does not tarry ever,' he said; 'but change and growth is not in all things and places alike. For the Elves the world moves, and it moves both very swift and very slow. Swift, because they themselves change little, and all else fleets by: it is a grief to them. Slow, because they do not count the running years, not for themselves. The passing seasons are but ripples ever repeated in the long long stream. Yet beneath the Sun all things must wear to an end at last.'
Oh, and also this interchange on memory, from just as they leave Lothlorien-- I know at least one fic that has used a quote as a title:
'Tell me, Legolas, why did I come on this Quest? Little did I know where the chief peril lay! Truly Elrond spoke, saying that we could not foresee what we might meet upon our road. Torment in the dark was the danger that I feared, and it did not hold me back. But I would not have come, had I known the danger of light and joy. Now I have taken my worst wound in this parting, even if I were to go this night straight to the Dark Lord. Alas for Gimli son of Gloin!'
'Nay!' said Legolas. 'Alas for us all! And for all that walk the world in these after-days. For such is the way of it: to find and lose, as it seems to those whose boat is on the running stream. But I count you blessed, Gimli son of Gloin: for your loss you suffer of your own free will, and you might have chosen otherwise. But you have not forsaken your companions, and the least reward that you shall have is that the memory of Lothlorien shall remain ever clear and unstained in your heart, and shall neither fade nor grow stale.'
'Maybe,' said Gimli, 'and I thank you for your words. True words doubtless; yet all such comfort is cold. Memory is not what the heart desires. That is only a mirror, be it clear as Kheled-zaram. Or so says the heart of Gimli the Dwarf. Elves may see things otherwise. Indeed I have heard that for them memory is more like to the waking world than to a dream. Not so for Dwarves.
For all your angsty-fic needs.