可持续性不是一种选择，而是我们对后代的责任。
Sustainability isn't a choice—it's our responsibility to future generations.
我不让仇恨分散我的注意力，我让它激励我。
一切迄今为止社会的历史都是阶级斗争的历史。
眼睛是什么也看不见的，一定要用心去看。
我们不害怕冒险，但我们会明智地冒险。
"Books are the way that we communicate with the dead. The way that we learn lessons from those who are no longer with us, that humanity has built on itself, progressed, made knowledge incremental rather than something that has to be relearned, over and over."