Philip K. Dick
So we and our elaborately evolving computers may meet each other halfway. Someday a human being, named perhaps Fred White, may shoot a robot named Pete Something-or-other, which has come out of a General Electric factory, and to his surprise see it weep and bleed. And the dying robot may shoot back and, to its surprise, see a wisp of gray smoke arise from the electric pump that it supposed was Mr. White's beating heart. It would be rather a great moment of truth for both of them.
Reality is that which refuses to go away when I stop believing in it.
Reality is that which, when you stop believing in it, doesn't go away.
Don't try to solve serious matters in the middle of the night.
The basic tool for the manipulation of reality is the manipulation of words. If you can control the meaning of words, you can control the people who must use the words.
Sometimes the appropriate response to reality is to go insane.
My major preoccupation is the question, 'What is reality?' Many of my stories and novels deal with psychotic states or drug-induced states by which I can present the concept of a multiverse rather than a universe. Music and sociology are themes in my novels, also radical political trends; in particular I've written about fascism and my fear of it.