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The great powers are always searching for opportunities to gain power at the expense of their rivals, and they will use force if they think it will profit them.

Life is too short for long-term grudges.

我不缺乏把一個想法徹底思考下去的勇氣，到目前為止，我還沒有遇到過我害怕的想法。

Psychology must be a science of facts, not theories.

To be a Negro in America is to be in a constant state of rage.

膨脹是使宇宙變得平坦、均勻和各向同性的機制。