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.

重要的不是身体的力量，而是精神的力量。

Peace is not free, it requires constant effort to maintain.

眼睛是什么也看不见的，应该用心去寻找。

I'm not afraid of storms, for I'm learning how to sail my ship.

学习计量经济学的最佳方法是通过实践——处理真实的数据和真实的问题。

密码学的力量不仅在于保守秘密，还在于在数字世界中建立信任。