We all know the game has a really beautiful writing style, so there's a lot of remarkable and poetic moments. It doesn't matter whether it something quoted by a character (either poem, quote, etc) or a small interaction between two characters (a whole conversation or a single phrase). I'm curious to see what your favorite piece of dialogue is, beautiful either from the context from where it took place or just because it was poetic.
For me, it's when Asterion quotes Sappho:
"For the man who is beautiful is beautiful to see but the good man will at once also beautiful be."
I just think the context from where it was said (the second time) makes it even more meaningful, and the quote itself is beautiful.