劳动的自然价格是使劳动者能够生存并延续其后代所必需的价格，既不增加也不减少。
自由不仅仅是随心所欲的机会；也不仅仅是在既定选项之间选择的机会。自由首先是制定可用选择的机会，对它们进行辩论——然后，才是选择的机会。
It must be remembered that while sympathy with joy intensifies the sum of joy in the world., sympathy with pain does not really diminish the amount of pain. It may make man better able to endure evil, but the evil remains.
变得更幸福既需要意愿也需要正确的方法。
石油和天然气的未来在于平衡传统专业知识和尖端技术。
我通常会说心里话，但这年头说出真心话是个错误，容易引起他人误会。
The best designs are those that solve problems elegantly without drawing attention to themselves.