智慧始于惊奇。
质数就是当你把所有模式都剔除后剩下的东西。我觉得质数就像生活，它们非常有逻辑性，但你永远无法找出规律，即使你花上一辈子时间去思考。
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.
