One of the first DT songs I really got into, and still probably my favorite DT songs of all. Very emotional, energetic, uplifting, rocking, and soulful, all in one, it explores so much emotions in such a short song. I love the lyrics, descriptive yet ambiguous and poetic (I posted my interpretation in some old thread I can't find, but basically to me it's about a depressed man who breaks out of his shell when he finds love). The whole 3:35-4:30 section is especially amazing, everything works together for a big climax.
It's also just so damn uplifting, which is my favorite aspect. I&W's sort of brighter sound helped with that. I don't think Surrounded could've been on any other album.