译文：山间的溪水容易上涨和退却，小人的心思容易反反复复。赏析：君子胸怀坦荡，光明磊落，真诚待人，和君子相处，如沐春风，让人心旷神怡。而小人心胸狭窄，鸡肠鼠肚，睚眦必报，和小人交往，无异于和豺狼同行。

每一天都是新的机会。

生命短暂，你必须不断前进。

数学是人类精神最美丽、最强大的创造。

In quantum mechanics, the act of measurement can change the state of the system being measured.

To do mathematics is to engage in an act of discovery and conjecture, intuition and inspiration.

The key to successful investing is to have a long-term perspective.