“Your mind is all you truly have.”

Source: Veronika Decides to Die (1998)

Source: The House that Jack Built (2001), Chapter 4 (p. 85)

Source: Water Sleeps (1999), Chapter 83 (p. 298)

From Yoshikazu Nakayama's biography of Miki, My Oyasama, vol. 2, p. 40–1.
My Oyasama

Source: Zen and the Art of Motorcycle Maintenance: An Inquiry Into Values

Interview in Penthouse (June 1983)
Context: I don't think that anyone should think for you. And that's exactly what cults do. All cults, including Scientology, say, "I am your mind, I am your brain. I've done all the work for you, I've laid the path open for you. All you have to do is turn your mind off and walk down the path I have created." Well, I have learned that there's great strength in diversity, that a clamorous discussion or debate is very healthy and should be encouraged. That's why I like our political setup in the United States: simply because you can fight and argue and jump up and down and shout and scream and have all kinds of viewpoints, regardless of how wrongheaded or ridiculous they might be. People here don't have to give up their right to perceive things the way they believe. Scientology and all the other cults are one-dimensional, and we live in a three-dimensional world. Cults are as dangerous as drugs. They commit the highest crime: the rape of the soul.

Source: The Magician's Apprentice