I tear up when listening to classical music sometimes, too. There's parts where it sounds just so powerful and beautiful, and it tugs at your emotions. I've compared instrumental music to reading a book, where listening to music with words is to watching a movie. Instrumental music allows you to use your own imagination and create a "story" of sorts, and everyone can come out with something completely different, it's really cool. And sometimes those stories are powerful enough to that person that they literally get emotional. One of the many reasons I love classical music.
