“In my opinion, it helps enormously to know why something is true, rather than being told it is true, for why should you believe me? Never believe anything on the authority of a single person but seek confirmation — and reason is the best confirmation.”

Original: (la) Auctoritas siquidem ex vera ratione processit, ratio vero nequaquam ex auctoritate. Omnis enim auctoritas, quae vera ratione non approbatur, infirma videtur esse. Vera autem ratio, quum virtutibus suis rata atque immutabilis munitur, nullius auctoritatis adstipulatione roborari indigent.

De Divisione Naturae, Bk. 1, ch. 69; translation by I. P. Sheldon-Williams, cited from Peter Dronke (ed.) A History of Twelfth-Century Western Philosophy (Cambridge: CUP, 1988) p. 2.

Source: The Roving Mind (1983), p. 43
Context: Don't you believe in flying saucers, they ask me? Don't you believe in telepathy? — in ancient astronauts? — in the Bermuda triangle? — in life after death?
No, I reply. No, no, no, no, and again no.
One person recently, goaded into desperation by the litany of unrelieved negation, burst out "Don't you believe in anything?"
"Yes", I said. "I believe in evidence. I believe in observation, measurement, and reasoning, confirmed by independent observers. I'll believe anything, no matter how wild and ridiculous, if there is evidence for it. The wilder and more ridiculous something is, however, the firmer and more solid the evidence will have to be."

Source: Addicted Magazine - https://www.weraddicted.com/matkai-burmaster-wants-us-to-be-fearless-about-our-streaming-and-digital-content-creating/

quoted by Floyd Goodrich, in Edward Hopper, H. Abrams, New York 1971
1941 - 1967

" Would You Slap Your Father? If So, You’re a Liberal http://www.nytimes.com/2009/05/28/opinion/28kristof.html?em", New York Times, 27 May 2009

The Decline and Fall of Science (1976)

Source: Half Asleep in Frog Pajamas

The Atheist's Guide to Reality (2011)

Anarchism: Its Philosophy and Ideal (1896)
Context: The masses have never believed in sophisms taught by economists, uttered more to confirm exploiters in their rights than to convert exploited! Peasants and workers, crushed by misery and finding no support in the well-to-do classes, have let things go, save from time to time when they have affirmed their rights by insurrection. And if workers ever thought that the day would come when personal appropriation of capital would profit all by turning it into a stock of wealth to be shared by all, this illusion is vanishing like so many others. The worker perceives that he has been disinherited, and that disinherited he will remain, unless he has recourse to strikes or revolts to tear from his masters the smallest part of riches built up by his own efforts; that is to say, in order to get that little, he already must impose on himself the pangs of hunger and face imprisonment, if not exposure to Imperial, Royal, or Republican fusillades.
But a greater evil of the present system becomes more and more marked; namely, that in a system based on private appropriation, all that is necessary to life and to production — land, housing, food and tools — having once passed into the hands of a few, the production of necessities that would give well-being to all is continually hampered. The worker feels vaguely that our present technical power could give abundance to all, but he also perceives how the capitalistic system and the State hinder the conquest of this well-being in every way.
Far from producing more than is needed to assure material riches, we do not produce enough.