"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts."
"The essence of the liberal outlook lies not in what opinions are held, but in how they are held; instead of being held dogmatically, they are held tentatively, and with a consciousness that new evidence may at any moment lead to their abandonment."
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Source: Bertrand Russell, John G. Slater, Peter Köllner (1997). “Last Philosophical Testament: 1943-68”, p.400, Psychology Press
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