生活要朴素，情操要高尚。
"The essence of mathematics is not to make simple things complicated, but to make complicated things simple."
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.
