The great powers are always searching for opportunities to gain power at the expense of their rivals, and they will use force if they think it will profit them.

你的希望升不起来是因为我。

The power of mathematics comes from its ability to abstract and generalize, turning specific problems into universal truths.

怀疑是智慧的开始。

——〈中国问题的真解决〉，与伦敦《滨海杂志》记者谈话，1911年11月

耐心是商业中的美德。真正的奢侈品不能急于求成。