一个理论的优雅不仅在于其数学表述，还在于其在一个统一框架下连接不同现象的能力。
The elegance of a theory is not just in its mathematical formulation, but in its ability to connect disparate phenomena under a unified framework.
你无法改变你的来处，但你可以改变你的去向。
精神生活是唯一值得过的生活。
The only way of discovering the limits of the possible is to venture a little way past them into the impossible.
The historian must have some kinship with his subject. The dead will not speak unless they are properly addressed.