“Maybe each human being lives in a unique world, a private world different from those inhabited and experienced by all other humans. . . If reality differs from person to person, can we speak of reality singular, or shouldn't we really be talking about plural realities? And if there are plural realities, are some more true (more real) than others? What about the world of a schizophrenic? Maybe it's as real as our world. Maybe we cannot say that we are in touch with reality and he is not, but should instead say, His reality is so different from ours that he can't explain his to us, and we can't explain ours to him. The problem, then, is that if subjective worlds are experienced too differently, there occurs a breakdown in communication ... and there is the real illness.”

“But I consider that the matter of defining what is real — that is a serious topic, even a vital topic. And in there somewhere is the other topic, the definition of the authentic human. Because the bombardment of pseudo- realities begins to produce inauthentic humans very quickly, spurious humans — as fake as the data pressing at them from all sides. My two topics are really one topic; they unite at this point. Fake realities will create fake humans. Or, fake humans will generate fake realities and then sell them to other humans, turning them, eventually, into forgeries of themselves. So we wind up with fake humans inventing fake realities and then peddling them to other fake humans. It is just a very large version of Disneyland. You can have the Pirate Ride or the Lincoln Simulacrum or Mr. Toad’s Wild Ride — you can have all of them, but none is true.”

“I want to write about people I love, and put them into a fictional world spun out of my own mind, not the world we actually have, because the world we actually have does not meet my standards. Okay, so I should revise my standards; I'm out of step. I should yield to reality. I have never yielded to reality. That's what SF is all about. If you wish to yield to reality, go read Philip Roth; read the New York literary establishment mainstream bestselling writers….This is why I love SF. I love to read it; I love to write it. The SF writer sees not just possibilities but wild possibilities. It's not just 'What if' - it's 'My God; what if' - in frenzy and hysteria. The Martians are always coming.”

“Today we live in a society in which spurious realities are manufactured by the media, by governments, by big corporations, by religious groups, political groups... So I ask, in my writing, What is real? Because unceasingly we are bombarded with pseudo-realities manufactured by very sophisticated people using very sophisticated electronic mechanisms. I do not distrust their motives; I distrust their power. They have a lot of it. And it is an astonishing power: that of creating whole universes, universes of the mind. I ought to know. I do the same thing.”

“Understanding the physiological and neurological features of spiritual experiences should not be interpreted as an attempt to discredit their reality or explain them away. Rather, it demonstrates their physical existence as a fundamental, shared part of human nature. Spiritual experiences cannot be considered irrational, since we have seen that, given their physiological basis, experiencers' descriptions of them are perfectly rational... All human perceptions of material reality can ultimately be documented as chemical reactions in our neurobiology; all our sensations, thoughts, and memories are ultimately reducible to chemistry, yet we feel no need to deny the existence of the material world; it is not less real because our perceptions of it are biologically based... It is not rational to assume that the spiritual reality of core experiences is any less real than the more scientifically documentable material reality.”

“He says we need to live in the real world, where war and death are a reality, not pretend.”

“We're all dreaming,” Arctor said. If the last to know he's an addict is the addict, then maybe the last to know when a man means what he says is the man himself, he reflected. He wondered how much of the garbage that Donna had overheard he had seriously meant. He wondered how much of the insanity of the day--his insanity--had been real, or just induced as a contact lunacy, by the situation. Donna, always, was a pivot point of reality for him; for her this was the basic, natural question. He wished he could answer.”