In one of the most brilliant papers in the English language Hume made it clear that what we speak of as 'causality' is nothing more than the phenomenon of repetition. When we mix sulphur with saltpeter and charcoal we always get gunpowder. This is true of every event subsumed by a causal law in other words, everything which can be called scientific knowledge. "It is custom which rules ," Hume said, and in that one sentence undermined both science and philosophy .
Philip K. DickI became educated to the fact that the greatest pain does not come zooming down from a distant planet, but from the depths of the heart. Of course, both could happen; your wife and child could leave you, and you could be sitting alone in your empty house with nothing to live for, and in addition the Martians could bore through the roof and get you.
Philip K. DickI think that, like in my writing, reality is always a soap bubble, Silly Putty thing anyway. In the universe people are in, people put their hands through the walls, and it turns out they're living in another century entirely. I often have the feeling — and it does show up in my books — that this is all just a stage.
Philip K. DickBecause 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.
Philip K. DickInsanity - to have to construct a picture of one's life, by making inquiries of others.
Philip K. DickMy 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.
Philip K. Dick