古之立言者，皆有所为而为之，非苟而已也。
古代著书立说的人，都是有所为而为之，不是随便写写的。
The world is not dialectical—it is sworn to extremes, not to equilibrium, sworn to radical antagonism, not to reconciliation or synthesis.
"I don't want to be at the mercy of my emotions. I want to use them, to enjoy them, and to dominate them."
"The truth is rarely pure and never simple."
Optimism is not just a trait; it's a skill that can be cultivated.
做出伟大工作的唯一途径是热爱你所做的事情。
这个世界惟有两样东西让我们的心灵感到深深的震撼，一是我们头顶上灿烂的星空，一是我们内心崇高的道德法则。