“For the most part similarities of various degrees will occur in one perceptual situation; and then specific perceptual units will be formed not simply because their members resemble each other, but because their mutual resemblance is greater than is that of such members and any other parts of the situation.”

Encyclopedia of the Philosophical Sciences (1816)

Light (1919), Ch. XVI - De Profundis Clamavi
Context: Men have gone towards each other because of that ray of light which each of them contains; and light resembles light. It reveals that the isolated man, too free in the open expanses, is doomed to adversity as if he were a captive, in spite of appearances; and that men must come together that they may be stronger, that they may be more peaceful, and even that they may be able to live.
For men are made to live their life in its depth, and also in all its length. Stronger than the elements and keener than all terrors are the hunger to last long, the passion to possess one's days to the very end and to make the best of them. It is not only a right; it is a virtue.

Source: What Is This Thing Called Science? (Third Edition; 1999), Chapter 1, Science as knowledge derived form the facts of experience, p. 8.

AppendiX, "King Squid", Part III: Expounding with brevity on the pecularities of squid lore, note 32
City of Saints and Madmen (2001–2004)

Source: 1940s-1950s, Administrative Behavior, 1947, p. 100.

Source: "Let the Record Speak" 1939, “The Truth about Communism” https://babel.hathitrust.org/cgi/pt?id=mdp.39015051180423&view=1up&seq=5 (1948), p. 16

1780s, Letter to Peter Carr (1787)
Context: The moral sense, or conscience, is as much a part of man as his leg or arm. It is given to all human beings in a stronger or weaker degree, as force of members is given them in a greater or less degree. It may be strengthened by exercise, as may any particular limb of the body. This sense is submitted, indeed, in some degree, to the guidance of reason; but it is a small stock which is required for this: even a less one than what we call common sense. State a moral case to a ploughman and a professor. The former will decide it as well, and often better than the latter, because he has not been led astray by artificial rules.

CBC Television Interview, Washington, 1960 Watch it Here http://www.youtube.com/watch?v=EWitsAgxd8U

Source: What Is This Thing Called Science? (Third Edition; 1999), Chapter 2, Observation as practical intervention, p. 21.