Just as the law in civilized ...

Just as the law in civilized countries assumes that the voice of conscience tells everybody, \
Just as the law in civilized countries assumes that the voice of conscience tells everybody, "Thou shalt not kill," even though man's natural desires and inclinations may at times be murderous, so the law of Hitler's land demanded that the voice of conscience tell everybody: "Thou shalt kill," although the organizers of the massacres knew full well that murder is against the normal desires and inclinations of most people. Evil in the Third Reich had lost the quality by which most people recognize it - the quality of temptation.
 Hannah Arendt

Quotes from the same author

Promises are the uniquely human way of ordering the future, making it predictable and reliable to the extent that this is humanly possible.
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 Hannah Arendt
If the ability to tell right from wrong should have anything to do with the ability to think, then we must be able to 'demand' its exercise in every sane person no matter how erudite or ignorant.
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 Hannah Arendt
If the ability to tell right from wrong should turn out to have anything to do with the ability to think, then we must be able to "demand" its exercise from every sane person, no matter how erudite or ignorant, intelligent or stupid, he may happen to be. Kant in this respect almost alone among the philosophers was much bothered by the common opinion that philosophy is only for the few, precisely because of its moral implications.
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 Hannah Arendt
Power corresponds to the human ability not just to act but to act in concert. Power is never the property of an individual; it belongs to a group and remains in existence only so long as the group keeps together. When we say of somebody that he is 'in power' we actually refer to his being empowered by a certain number of people to act in their name. The moment the group, from which the power originated to begin with ... disappears, 'his power' also vanishes.
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 Hannah Arendt
This inability to think created the possibility for many ordinary men to commit evil deeds on a gigantic scale, the like of which had never been seen before. The manifestation of the wind of thought is not knowledge but the ability to tell right from wrong, beautiful from ugly. And I hope that thinking gives people the strength to prevent catastrophes in these rare moments when the chips are down.
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 Hannah Arendt