陌生人与我们接近，因为我们在他们和我们自己之间感受到民族、社会、职业或一般人类本性的共同特征。他们远离我们，因为这些共同特征超越了他们或我们，并且只因为它们连接了许多人而连接我们。
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.
语言既是桥梁，也是障碍。
The beauty of mathematics lies in its ability to describe the universe in the most elegant way possible.