相对论是一种原理性理论，而非构造性理论。
You gotta have fun with it. If you're not having fun, what's the point?
这是个有趣的星球，值得你倾注全部注意力。
Always look at what you have left. Never look at what you have lost.
Being is always the Being of a being.
不登上高山，就不知道天是多么高远；不亲临深溪，就不知道地是多么深厚。