最大的残疾是坏的态度。

在数学中，提出问题的艺术必须比解决问题更有价值。

The key is to set realistic customer expectations, and then not to just meet them, but to exceed them—preferably in unexpected and helpful ways.

The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.

要想端正自身行为，先要端正自己的身心；要想处理好天下大事，先要处理好身边小事。