“Ideas may be superior to vested interest. They are also very often the children of vested interest.”

Autobiography (1936; 1949; 1958)
Context: Organised religion allying itself to theology and often more concerned with its vested interests than with the things of the spirit encourages a temper which is the very opposite of science. It produces narrowness and intolerance, credulity and superstition, emotionalism and irrationalism. It tends to close and limit the mind of man and to produce a temper of a dependent, unfree person.
Even if God did not exist, it would be necessary to invent Him, so Voltaire, said … perhaps that is true, and indeed the mind of man has always been trying to fashion some such mental image or conception which grew with the mind's growth. But there is something also in the reverse proposition: even if God exist, it may be desirable not to look up to Him or to rely upon Him. Too much dependence on supernatural forces may lead, and has often led, to loss of self-reliance in man, and to a blunting of his capacity and creative ability. And yet some faith seems necessary in things of the spirit which are beyond the scope of our physical world, some reliance on moral, spiritual, and idealistic conceptions, or else we have no anchorage, no objectives or purpose in life. Whether we believe in God or not, it is impossible not to believe in something, whether we call it a creative life-giving force, or vital energy inherent in matter which gives it its capacity for self-movement and change and growth, or by some other name, something that is as real, though elusive, as life is real when contrasted with death. <!-- p. 524 (1946)

http://www.sciencefriday.com/segments/carl-sagan-science-is-a-way-of-thinking/
Carl Sagan: 'Science Is a Way of Thinking', Science Friday interview from May 1996
27 December 2013

page 51.
Quarks, Chaos & Christianity (1995)

2016, Joint press conference of 17 November 2016

The Roman Revolution ([1939] 2002), ch. 11.
Context: The political cant of a country is naturally and always most strongly in evidence on the side of the vested interests. In times of peace and prosperity it commands a wide measure of acquiescence, even of belief. Revolution rends the veil.

AIDS and Its Metaphors, (1989), ch. 6, p. 149
Context: Authoritarian political ideologies have a vested interest in promoting fear, a sense of the imminence of takeover by aliens — and real diseases are useful material. Epidemic diseases usually elicit a call to ban the entry of foreigners, immigrants. And xenophobic propaganda has always depicted immigrants as bearers of disease (in the late nineteenth century: cholera, yellow fever, typhoid fever, tuberculosis). … Such is the extraordinary potency and efficacy of the plague metaphor: it allows a disease to be regarded both as something incurred by vulnerable "others" and as (potentially) everyone's disease.

Quoted in a 1976 interview, published in Desert Plants by Walter Zimmermann.

The Syntax of Sorcery (2012)
Context: I'll say this much: virtually every advancement made by our species since civilization first peeked out of its nest of stone has been initiated by lone individuals, mavericks who more often than not were ignored, mocked, or viciously persecuted by society and its institutions. Society in general maintains such a vested interest in its cozy habits and solidified belief systems that it had rather die – or kill – than entertain change. Consider how threatened religious fundamentalists of all faiths remain to this day by science in general and Darwin in particular.
Cultural institutions by and large share one primary objective: herd control. Even when ostensibly benign, their propensity for manipulation, compartmentalization, standardization and suppression of potentially disruptive behavior or ideas, has served to freeze the evolution of consciousness practically in its tracks. In technological development, in production of material goods and creature comforts, we've challenged the very gods, but psychologically, emotionally, we're scarcely more than chimpanzees with bulldozers, baboons with big bombs.

Page 285.
Your Right to Know: A Citizen's Guide to the Freedom of Information Act, 2nd Edition