From Jack Kerouac, Windblown World: The Journals of Jack Kerouac 1947-1954:
Another thought that helps a writer as he works along--let him write his novel "the way he'd like to see a novel written." This helps a great deal freeing you from the fetters of self-doubt and the kind of self-mistrust that leads to over-revision, too much calculation, preoccupation with "what others would think." Look at your own work and say, "This is a novel after my own heart!" Because that's what it is anyway, and that's the point--it's worry that must be eliminated for the sake of individual force. In spite of all this insouciant advice, I myself advanced slowly today, but not poorly, working on the final draft of the chapter. I'm a little rusty. Oh and what a whole lot of bunk I could write this morning about my fear that I can't write, I'm ignorant and worst of all, I'm an idiot trying to achieve something I can't possibly do. It's in the will, in the heart! To hell with these rotten doubts. I defy them and spit on them. Merde!