If you are brave to say 'good bye', life will reward you with a new 'hello'.
People demand freedom of speech as a compensation for the freedom of thought which they seldom use.
发现可能性的极限的唯一方法是超越它们进入不可能。
法律的概念涉及主要规则和次要规则的结合。
数学的快乐来自于为理解而奋斗。