最终，我们将记住的不是敌人的话语，而是朋友的沉默。
"In the end, we will remember not the words of our enemies, but the silence of our friends."
生存，还是毁灭，这正是问题所在。
Small changes in the environment can have big effects on behavior.
这句话杨在不同场合说过多次，每次表述时可能有个别字的差异。
你永远不会失去梦想；它只是作为一种爱好在孵化。
"Sometimes the hardest thing to do is to tell the simplest truth."
Immigration has a much smaller effect on native wages than most people believe.
The root of the problem is the failure to distinguish between operational effectiveness and strategy.
书籍是灵魂的镜子。