As quoted in [F. J. Duarte, Laser Physicist, Optics Journal, 2012, 978-0-9760383-1-3, 63]
“History is ultimately determined by ideas, and ideas can, at least in principle, change almost instantly. But in order for ideas to change it is not sufficient for people to see that something is wrong. At least a significant number must also be intelligent enough to recognize what it is that is wrong. That is, they must understand the basic principles upon which society — human cooperation — rests … And they must have sufficient will power to act according to this insight.”
"The Rise and Fall of the City" (23 November 2005) at the Ludwig von Mises Institute http://www.mises.org/story/1959
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Hans-Hermann Hoppe 21
Austrian school economist and libertarian anarcho-capitalis… 1949Related quotes
Source: Intuitions and Summaries of Thought (1862), Volume I, p. 83.

As quoted by Francis Crick in his presentation "The Impact of Linus Pauling on Molecular Biology" http://oregonstate.edu/dept/Special_Collections/subpages/ahp/1995symposium/crick.html (1995).
1990s
Forward to Integral Medicine: A Noetic Reader (2003) edited by Marilyn Schlitz & Tina Hyman http://wilber.shambhala.com/html/misc/integral-med-1.cfm
Unsourced variant: I don't believe that any human mind is capable of 100 percent error... Nobody is smart enough to be wrong all the time.
Context: An integral approach is based on one basic idea: no human mind can be 100% wrong. Or, we might say, nobody is smart enough to be wrong all the time. And that means, when it comes to deciding which approaches, methodologies, epistemologies, or ways or knowing are "correct," the answer can only be, "All of them." That is, all of the numerous practices or paradigms of human inquiry — including physics, chemistry, hermeneutics, collaborative inquiry, meditation, neuroscience, vision quest, phenomenology, structuralism, subtle energy research, systems theory, shamanic voyaging, chaos theory, developmental psychology—all of those modes of inquiry have an important piece of the overall puzzle of a total existence that includes, among other many things, health and illness, doctors and patients, sickness and healing.
Source: “Evolutionary Theory and Theological Ethics” (2012), p. 250

“My basic ideas have not changed. I see no reason to change them.”
Israel Epstein, Prominent Chinese Communist, Dies at 90 in The New York Times https://www.nytimes.com/2005/06/02/world/asia/israel-epstein-prominent-chinese-communist-dies-at-90.html (2 June 2005)

Massachusetts must lead in teaching it.
1920s, Law and Order (1920)

“When no idea seems right, the right one must seem wrong.”
Music, Mind, and Meaning (1981)

Source: The Islamic Declaration (1970), p. 31.