
Source: The Nature of the Physical World (1928), Ch. 13 Reality
Essay on Atomism: From Democritus to 1960 (1961)
Source: The Nature of the Physical World (1928), Ch. 13 Reality
Source: The Turning Point (1982), p. 82.
Source: The Tao of Physics: An Exploration of the Parallels between Modern Physics and Eastern Mysticism
Context: At the subatomic level, matter does not exist with certainty at definite places, but rather shows "tendencies to exist," and atomic events do not occur with certainty at definite times and in definite ways, but rather show "tendencies to occur."
"A Tale of Three Pictures", p. 428
Eight Little Piggies (1993)
http://www.independent.co.uk/news/science/why-richard-dawkins-is-no-scientist-the-survival-of-the-least-selfish-and-what-ants-can-tell-us-about-humans-eo-wilson-on-his-new-book-the-meaning-of-human-existence-9849956.html
Source: The Unfinished Autobiography (1951), Chapter I, Part 2
real, active men, as they are conditioned by a definite development of their productive forces and of the intercourse corresponding to these, up to its furthest forms. Consciousness can never be anything else than conscious existence, and the existence of men is their actual life-process. If in all ideology men and their circumstances appear upside down as in a camera obscura, this phenomenon arises just as much from their historical life-process as the inversion of objects on the retina does from their physical life-process.
Source: The German Ideology (1845-1846)