“When asked, "How do you write?" I invariably answer, "one word at a time."”

Letter to a friend, quoted in The Life of Florence Nightingale (1913) by Edward Tyas Cook, p. 94

Source: The Perks of Being a Wallflower

How I Wrote the Tarzan Books (1929)

Source: Seriously... I'm Kidding

"Poetry's Value", in Where Books Fall Open: A Reader's Anthology of Wit & Passion (David R. Godine Publisher, 2003), p. 56

Letter to his brother Jeff from Guadalcanal (28 January 1943); p. 28
To Reach Eternity (1989)
Context: I'm going to ask you something. If I do get killed, and I honestly don't see how I can help it, I want you to write that book we were thinking about when I enlisted. If I get it, it's a cinch I won't be able to do it, and it would make me feel a whole lot better to know that if not my name and hand, at least, the thot of me would be passed on and not forgotten entirely. You know, sort of put into the book the promise that I had and the things I might have written so at least the knowledge of talent wasted won't be lost... If I get it, no one will ever know to what heights I might have gone as a writer. Maybe if you wrote about the promise that was there, all wouldn't be lost.

Osho, And The Flowers Showered (2003), , p. 204