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。
Why is it that when one man builds a wall, the next man immediately needs to know what's on the other side?
The state of your life is nothing more than a reflection of your state of mind.
经济学不仅仅是预测行为，更是塑造行为。