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The best thing a human being can do is to help another human being know more.
Don't wait for permission to innovate - just start.
The most dangerous weapon is not the one that kills, but the one that changes minds.
如果人们有时不做愚蠢的事情,就不会有聪明的事情发生。
历史的重量是无法承受的,但我们必须承担它。