I am not a liberator. Liberators do not exist. The people liberate themselves.

反应倾向的强度取决于所接受的强化量。

成功是对怀疑者最好的报复。

The stranger is close to us, insofar as we feel between him and ourselves common features of a national, social, occupational, or generally human, nature. He is far from us, insofar as these common features extend beyond him or us, and connect us only because they connect a great many people.

过去不是我们抛在身后的东西；它是我们内心携带的东西，塑造着我们的现在和未来。