The Ethics of Belief (1877), The Duty of Inquiry
Context: To sum up: it is wrong always, everywhere, and for anyone, to believe anything upon insufficient evidence.
If a man, holding a belief which he was taught in childhood or persuaded of afterwards, keeps down and pushes away any doubts which arise about it in his mind, purposely avoids the reading of books and the company of men that call into question or discuss it, and regards as impious those questions which cannot easily be asked without disturbing it--the life of that man is one long sin against mankind.
“What I'm asking you to entertain is that there is nothing we need to believe on insufficient evidence in order to have deeply ethical and spiritual lives.”
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Sam Harris 151
American author, philosopher and neuroscientist 1967Related quotes
The Ethics of Belief (1877), The Limits Of Inference
Context: p>We may believe what goes beyond our experience, only when it is inferred from that experience by the assumption that what we do not know is like what we know. We may believe the statement of another person, when there is reasonable ground for supposing that he knows the matter of which he speaks, and that he is speaking the truth so far as he knows it.It is wrong in all cases to believe on insufficient evidence; and where it is presumption to doubt and to investigate, there it is worse than presumption to believe.</p
“What is introductory goes for nothing, but it is in order to explain the evidence.”
16 How. St. Tr. 181.
Layer's Case (1722)
Nobel Lecture (2010)
On winning his riding nomination in Quebec, as quoted in "Trudeau wins Montreal riding nomination" in CBC News (30 April 2007) http://www.cbc.ca/news/canada/story/2007/04/29/trudeau.html
before leading Liberals
“The faith of religion is belief on insufficient evidence.”