外表不端正的人，是因为德没有养成；内里不专—的人，是因为心没有治好。端正形貌，整饬内德，使万物都被掌握理解。

Sometimes the thing you're most afraid of is the thing that will set you free.

A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty.

You can discover what your enemy fears most by observing the means he uses to frighten you.

每一个超限的一致多重性，即每一个超限集合，必须有一个确定的阿列夫作为其基数。