"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts."
"When there are rational grounds for an opinion, people are content to set them forth and wait for them to operate. In such cases, people do not hold their opinions with passion; they hold them calmly, and set forth their reasons quietly. The opinions that are held with passion are always those for which no good ground exists; indeed the passion is the measure of the holder's lack of rational conviction."
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Source: Bertrand Russell (2004). “Sceptical Essays”, p.3, Psychology Press
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