“The hardest theme in science fiction is that of the alien. The simplest solution of all is in fact quite profound—that the real difficulty lies not in understanding what is alien, but in understanding what is self.”

"Men on other planets", essay in The Craft of Science Fiction, (1976), edited by Reginald Bretnor
General sources

Source: Light (2002), Chapter 2 “Gold Diggers of 2400 AD” (p. 16)

Source: Do Androids Dream of Electric Sheep? (1968), Chapter 21 (p. 230)

Source: Plague from Space (1965), Chapter 13 (p. 136)

Becker (1982) "Culture: A Sociological View", In: Yale Review, Summer 1982, pp. 513-27.

As quoted in "Can Olympia Snowe Change Washington?", interview by Kathleen Fleury and Virginia M. Wright, in Downeast magazine (October 2014).
Context: I understand that the hyper-partisanship in Washington makes people feel alienated. They're frustrated and they're angry, and they should be, but they can do something about it. We've got to turn it around. I'm concerned it's going to become institutionalized. … Make candidates accountable for making government work. That should be a debate question: What are you going to do to make government work? You can't sit on your hands and say, "No, I want it 100% my way." I don't know how this evolved, but I find it irrational — you don't demand that in any other sphere of life. The country is now in a virtual standstill. We can't begin to measure the reverberation of all this legislative neglect five, six, or whatever years into the future.

Source: Barracuda

Source: Psychologist at large, 1961, p. 3