“Facts, facts, facts,' cries the scientist if he wants to emphasize the necessity of a firm foundation for science. What is a fact? A fact is a thought that is true. But the scientist will surely not recognize something which depends on men's varying states of mind to be the firm foundation of science.”

Source: 1960s, "The Use and Misuse of Game Theory," 1962, p. 108

Sex Ed (2005)

Source: What Is This Thing Called Science? (Third Edition; 1999), Chapter 3, Experiment, p. 27.

"Shields of Expectation—and Actuality", p. 425
Eight Little Piggies (1993)

Source: Science and Hypothesis (1901), Ch. IX: Hypotheses in Physics, Tr. George Bruce Halsted (1913)
Context: The Scientist must set in order. Science is built up with facts, as a house is with stones. But a collection of facts is no more a science than a heap of stones is a house.

De Abaitua interview (1998)
Context: Mind has come up with this brilliant way of looking at the world — science — but it can’t look at itself. Science has no place for the mind. The whole of our science is based upon empirical, repeatable experiments. Whereas thought is not in that category, you can’t take thought into a laboratory. The essential fact of our existence, perhaps the only fact of our existence – our own thought and perception is ruled off-side by the science it has invented. Science looks at the universe, doesn’t see itself there, doesn’t see mind there, so you have a world in which mind has no place. We are still no nearer to coming to terms with the actual dynamics of what consciousness is.

Source: Debt: The First 5,000 Years (2011), Chapter Five, "A Brief Treatise on the Moral Grounds of Moral Relations", p. 96

Source: Initiation, The Perfecting of Man 1923, p. 15

Fischerisms (1944)