The search for happiness is one of the chief sources of unhappiness.

Every mathematical problem is a puzzle waiting to be solved, and every solution is a step towards greater understanding.

我不害怕坠入爱河，我只是害怕再次爱上错误的人。

对付一个不自由的世界唯一的方法就是变得如此绝对自由，以至于你的存在本身就是一种反叛。