“The writing is never what takes the most time. It’s trying to figure what you’re going to put down that fills the days. With anger at your own ineptitude, with frustration that nothing is happening inside your head, with panic that maybe nothing will ever happen inside your head, with blessed little moments that somehow knit together so that you can begin to visualize a scene.”  

— William Goldman, Adventures in the Screen Trade, 1983.

As seen in Remembering Screenwriting Legend William Goldman and His Quotes on Writing: Screenwriting Magazine