I came up with an idea for a song yesterday. Riding my bike to work, I developed the seeds of a chorus. Just before leaving work, I finished the chorus and e-mailed the lines to my home address. I'm pleased. What I've got so far has a cool metaphor that (to my knowledge) no one's used before, and it tackles an interesting topic.
But now ... now I have to write verses. I'm drawing a blank.
See, choruses are easy. They don't have to tell a story. They don't have to provide any specifics. All they have to do is present a basic concept in a catchy way. Coming up with the details that surround and support that concept? That's hard.