History is not just about the past, it is also a mirror of the present.

The more you learn, the more you know, the more you know, the more you forget. The more you forget, the less you know. So why bother to learn?

解决数学问题的过程往往比解决方案本身更重要。

"The use of traveling is to regulate imagination by reality, and instead of thinking how things may be, to see them as they are."

自由始终是并且仅仅是持不同思想者的自由。

写作是一种自由的形式，在这里我们可以表达我们最深的思想。

出自汉·桓宽《盐铁论·刺义》。品德高尚的人不拒绝听取负薪之人的意见，其名声才能远播。所以见多识广的人知识广博，多听多闻的人拥有智慧，拒绝别人劝说的人心胸狭隘，一味相信自己的人必然孤立。