"Anyway—as I was saying—there are for me stories of character, stories of idea and stories of image. These refer to the portals by which they enter my universe. The completed product, in the best of all possible worlds, should contain all three elements. But two is okay. And I’ll even settle for one on a bad day when I need the money."
January 1, 1970
https://en.wikiquote.org/wiki/Roger_Zelazny