What is your favorite poem of all time?

edgar allen poe - the raven i love the rhythm of it

I can't name just one favorite poet. There are too many whose work I love, classical and contemporary. The first poet that made me addicted to poetry was Edgar Allen Poe, when I was young enough I wasn't even in school yet, but since then I have read hundreds of others whose work I enjoy. If I have to pick just one favorite poem, it is Pablo Neruda's "Tonight I Can Write". I might have just happened to read it at the right time or something, but it summed up a lot of emotions I was feeling, and I can't get it out of my head, ever. I know it by heart, and it haunts me.