如果你想要与别人制造羁绊，就要承担流泪的风险。
If you want to make a bond, you are to take the risk of tearing.
Failure gave me an inner security that I had never attained by passing examinations. Failure taught me things about myself that I could have learned no other way. I discovered that I had a strong will, and more discipline than I had suspected; I also found out that I had friends whose value was truly above the price of rubies.
天下很多所谓可以做的事情，未必都是可以做的啊！
随机性和结构之间的相互作用是数学和计算机科学中的一个核心主题。