Musical Monday: Breaking Benjamin - Rain

Rain by Breaking Benjamin is a fairly mysterious song at a first listen.  Why is it so sad? What is it about? Listening to the song and paying attention to the lyrics may help:

The opening lyrics might provide a clue as to what the actual meaning of the song is.

"Not a dollar or a crowd could ever keep me here"

These lyrics likely refer to what it's actually like to be a rock star.  It's actually a prison of fame, and you don't get to see your loved ones for long stretches at a time.