The Origin of Love
One of my favorite pieces of philosophy is Plato's Symposium. When I think about this work, I believe in the ability of philosophy to touch on the sublime.
Here is a podcast, from the program Philosophy Bites, discussing the nature of erotic love from the Symposium.
For those who haven't read this dialogue, a great way to see how it has influenced our ideals of romance is to check out this clip from one of my favorite films Hedwig and the Angry Inch: