Abstraction allows for a kind of freedom that representation sometimes doesn't.
质量不是一时的风尚；它是一种哲学。
无论如何都要忠于自己
Acquiring things will rarely bring you deep satisfaction. But acquiring experiences will.
我不介意你思考得慢；我介意你发表得比思考快。
Every mathematical theorem is a story waiting to be told, a mystery waiting to be unraveled.