A good business is built on trust, not just profit.
The world is a book, and those who do not travel read only one page.
A fool who knows he is a fool is for that very reason a wise man. The fool who thinks he is wise is the one to be called a fool.
用心体会整理才能理解精确得当,所以应当沉着稳重,不然就成了口头耳边的小事,过后就忘了。事理要以典故为依据,因此必须学识广博,否则就成了随意推测,胡编乱造。