Courage doesn't always roar. Sometimes courage is the quiet voice at the end of the day saying, "I will try again tomorrow."
领导力意味着今天做出艰难的决定，这些决定将使子孙后代受益。
A good abstraction is one that emphasizes the important details and suppresses the unimportant ones.
一个好的抽象是强调重要细节并抑制不重要细节的抽象。
Ask not what your country can do for you --ask what you can do for your country.
真理很纯粹，可决不简单。