Psychology must be based on direct experience, not inference.

我会用city而永不用Metropolis来表达城市，用cop而永不用policeman来表达警察，既然三丶四个字母可以赚七个美分，为什么要用长而赘的字呢？

You can’t control everything in life, but you can control your attitude.

成功建立在不懈努力和坚定信念的基础上。