If you want to write, if you want to create, you must be the most sublime fool that God ever turned out and sent rambling. You must write every single day of your life. You must read dreadful dumb books and glorious books, and let them wrestle in beautiful fights inside your head, vulgar one moment, brilliant the next. You must lurk in libraries and climb the stacks like ladders to sniff books like perfumes and wear books like hats upon your crazy heads. I wish you a wrestling match with your Creative Muse that will last a lifetime. I wish craziness and foolishness and madness upon you. May you live with hysteria, and out of it make fine stories — science fiction or otherwise. Which finally means, may you be in love every day for the next 20,000 days. And out of that love, remake a world.
If a man comes to the door of poetry untouched by the madness of the Muses, believing that technique alone will make him a good poet, he and his sane compositions never reach perfection, but are utterly eclipsed by the performances of the inspired madman.
I don’t ask writers about their work habits. I really don’t care. Joyce Carol Oates says somewhere that when writers ask each other what time they start working and when they finish and how much time they take for lunch, they’re actually trying to find out, "Is he as crazy as I am?" I don’t need that question answered.
To say that a writer's hold on reality is tenuous is an understatement - it's like saying the Titanic had a rough crossing. Writer's build their own realities, move into them and occasionally send letters home. The only difference between a writer and a crazy person is that a writer gets paid for it.
I know writers have to be crazy. But more than that, they have to get mad and stay mad. If things don't make a writer mad, he'll end up writing Flopsy, Mopsy, and Cottantail.