"Certainty is the enemy of mankind. If you're certain about everything, you have the Inquisition, you have Nazis and you have - that certainty is something to be guarded about."

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It's not so much religion per se, it's false certainty that worries me, and religion just has more than its fair share of false certainty or dogmatism. I'm really concerned when I see people pretending to know things they clearly cannot know.

— Sam Harris