我喜欢快乐,我喜欢玩得开心。我喜欢大笑。我热爱生活。
The search for happiness is one of the chief sources of unhappiness.
Man's search for meaning is the primary motivation in his life.
Diversity in science leads to better solutions.
历史不是过去——它是我们组织对过去无知的方法。
勇气是知道什么不该畏惧。
A proof is a device for convincing someone else that a mathematical statement is true.