To be free is not merely to cast off one's chains, but to live in a way that respects and enhances the freedom of others.
The highest possible stage in moral culture is when we recognize that we ought to control our thoughts.  
合作在研究中至关重要;没有人能独自解决大问题。
摧毁资本主义制度的最好方法是破坏货币。
在商业中,你得到的不是你应得的,而是你谈判得来的。