Your most unhappy customers are your greatest source of learning.
It is sadder to find the past again and find it inadequate to the present than it is to have it elude you and remain forever a harmonious conception of memory.
【释义】要广博地学习文化知识，同时要用羞耻心来约束自己的行为。
最重要的是对你所做的事情充满热情。
Don't be afraid of failure, because every failure is practice for success.
