Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.
A picture is a representation, an illusion, a piece of magic, so what you see is not what you see.
真相很少纯粹，也绝不简单。
书籍是灵魂的镜子。
I don’t believe in luck. I believe in preparation meeting opportunity.
The joy of solving a mathematical problem is unparalleled; it is a moment of pure intellectual triumph.