学习数学的唯一方法就是做数学。
【释义】:慷慨但不浪费,节俭却不吝啬。
Introspection is the only method by which the mind can be directly observed.
You have to expect things of yourself before you can do them.
仁就是爱人,以亲近自己的亲族为最重要;义就是适宜,以尊重贤能的人为最重要。