"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts."
"While the dogmatist is harmful, the sceptic is useless ...; one is certain of knowing, the other of not knowing. What philosophy should dissipate is certainty, whether of knowledge or of ignorance. Knowledge is not so precise a concept as is commonly thought. Instead of saying 'I know this', we ought to say 'I more or less know something more or less like this'. ... Knowledge in practical affairs has not the certainty or the precision of arithmetic."
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Source: Bertrand Russell (1957). “Why I Am Not a Christian: And Other Essays on Religion and Related Subjects”, p.51, Simon and Schuster
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