When I face the desolate impossibility of writing five hundred pages, a sick sense of failure falls on me, and I know I can never do it. Then gradually, I write one page and then another. One day’s work is all I can permit myself to contemplate.—John Steinbeck (1939, jacket design by Elmer Hader; Public Domain)
…and then only focus on the piece in front of you. Repeat this process with tenacious persistence, and you will complete amazing works.