There's a lot of craft in songwriting. The divine inspiration is when the idea comes. It may be a riff. It may be a word. It may be a phrase. It may be a title. Sometimes, in the best of both worlds, that divine inspiration extends through the whole song. I've literally sat down and written a song from beginning to end, almost complete lyrics and everything without ever stopping...in two minutes. The chorus of 'She's Gone' was like that.