A proof is a device for convincing someone else that a mathematical statement is true.
唯一真正的错误是我们从中一无所获的错误。
The facts of life are very simple, but the stories we tell about them are very complicated.
如果你继续寻找幸福是由什么组成的，你永远不会幸福。如果你在寻找生命的意义，你就不会真正地活着。
Physics is not just about solving problems, it's about understanding the nature of reality.