"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts."
"Science, by itself, cannot supply us with an ethic. It can show us how to achieve a given end, and it may show us that some ends cannot be achieved. But among ends that can be achieved our choice must be decided by other than purely scientific considerations. If a man were to say, "I hate the human race, and I think it would be a good thing if it were exterminated," we could say, "Well, my dear sir, let us begin the process with you." But this is hardly argument, and no amount of science could prove such a man mistaken."
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Source: Bertrand Russell (2004). “Sceptical Essays”, p.126, Psychology Press
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