你最不满意的客户是你最大的学习来源。

The deepest theorems in mathematics often have the simplest statements.

没有改变就不可能进步，而无法改变思想的人也无法改变任何事。

凡是做学问，必须从各个方面都理解透彻，还要更进一步深入理解内在的道理。

A person may cause evil to others not only by his actions but by his inaction， and in either case， he is justly accountable to them for the injury.

The market will do what it has to do to prove the majority wrong.

I know what I can do, so it doesn't bother me what other people think or say.

【讲解】：在实行仁德之事的时候对自己的老师也不要谦让。