Most of the greatest evils that man has inflicted upon man have come through people feeling quite certain about something which, in fact, was false.
Physics is mathematical not because we know so much about the physical world, but because we know so little; it is only its mathematical properties that we can discover.
No nation was ever so virtuous as each believes itself, and none was ever so wicked as each believes the other.
It is not my prayer and humility that you cause things to go as you wish, but by acquiring a knowledge of natural laws.
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