Lyric discussion by DocMessenger 

"Dan is a fan and he lives for our music It’s the only thing that gets him by...Oh, but you and me keep thinking That the world’s just passing us by"

He's telling his brother that while things seem to be boring and monotonous, as I'm sure they are in that business, when you only have a limited selection of songs to play at every gig, some of the people listening to you are living on every word, and their world will come crashing down on them if you end it all.

In other words, the world is bigger than Ray and Dave, and they owe the world the best music they can provide. And, thankfully, the song did seem to get through to Dave.

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