夫仁者，己欲立而立人，己欲达而达人。能近取譬，可谓仁之方也已。
所谓仁人，只要能做到自己想成功时先帮别人成功，自己想得到时先帮别人得到，就可以了。推己及人，可算实行仁的方法。
数学不是一项观赏性运动；要理解它，必须积极参与其中。
Most people are afraid of change, but if you look at it like it's something that can always count on, then it can be a comfort．It doesn't have many things that you can count on．
The mathematician's best work is art, a high perfect art, as daring as the most secret dreams of imagination, clear and limpid.