We teach a subject not to produce little living libraries on that subject, but rather to get a student to think mathematically for himself.

Ihate people who talk about themselves, as you do, when one wants to talk about oneself, as I do.

没有坚强意志品质的人学识智慧也不会通达;不遵守诺言的人行动也不会实现。

农时：指春耕、夏耘、秋收三个时令。与其等灾荒来了再想办法补救，不如早防备灾荒，而防备灾荒最好就是抓住农时。