“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.
Statement of 1975 quoted in the Dictionary of Literary Biography (1981) vol. 8, part 1
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Philip K. Dick 278
American author 1928–1982Related quotes

Source: The Emperor's New Mind (1989), Ch. 6, Quantum Magic and Quantum Mastery, p. 269.
Context: It seems to me that we must make a distinction between what is "objective" and what is "measurable" in discussing the question of physical reality, according to quantum mechanics. The state-vector of a system is, indeed, not measurable, in the sense that one cannot ascertain, by experiments performed on the system, precisely (up to proportionality) what the state is; but the state-vector does seem to be (again up to proportionality) a completely objective property of the system, being completely characterized by the results it must give to experiments that one might perform.
Source: Sisters in Crime: The Rise of the New Female Criminal (1975), P. 31.

Speech in the House of Commons (7 July 1981) http://hansard.millbanksystems.com/commons/1981/jul/07/defence-programme
Post-Prime Ministerial

“A central concept called into question by net-poetry is the relation with reality.”
Does it make sense to define "virtual" reality as what actually reaches us through the Internet? How the artist relates to it, how he or she perceives and represents it and how a net-poet should "sing" it? The relationship with reality mediated by the Internet is a network of contacts in itself, it is ontologically a "connective" image of reality, which gradually outlines and qualify itself, both as reality and as representation.
Source: Virtual Mercury House. Planetary & Interplanetary Events, p. 132