Where did the idea re-working old song ideas into new ones come from? Is it from wanting to change what you did before or are the themes the same, you just wanted to add to them?
I think he's said before that he'll have most of a song written but won't know how to start it out and then he finds that the intro to some old song actually fits it really well so he works that into it. But I couldn't find that written anywhere so maybe that's not exactly true.
In this interview
, Mike said that he sometimes practices with old lyrics when he's working on his vocal approach and then I guess they just stick.
Edit: Found a reference for the first thing I said.
Basically, he has a hard time coming up with opening lines