The best way to make money is to buy something and then do nothing.

Give the pupils something to do, not something to learn; and the doing is of such a nature as to demand thinking; learning naturally results.

最难的是理解已经知道的东西。

我不是商人，我就是生意本身。

不要害怕可能出错的事情，想想可能正确的事情。