As I'm writing, I start to see connections, and themes I didn't see, and that sparks other things. So then I go back and rewrite things or alter them. It's a combination of intuition and a lot of finessing. It becomes a combination of the rational and the irrational.
A girl had bidden me eat and drink and sleep, and had shown me friendship and had laughed at me and had called me a silly little boy. And this wonderful friend had talked to me of the saints and shown me that even when I had outdone myself in absurdity I was not alone.