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。

I don't know where the limits are, but I would like to go there.

I didn't think I was ever going to get a sensible question.

一个奇怪的事实是，关于塑造地球表面的力量的性质，人们持有完全相反的观点，这反映了我们目前知识的不完整状态。