人们并不总是理性的，他们的非理性行为可能会产生重大的经济后果。
信任是每一段牢固关系的基础，无论是在商业还是生活中。
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.