自由贸易能够提高国家整体的生产效益。
Every improvement in the circumstances of the society tends either directly or indirectly to raise the real rent of land, to increase the real wealth of the landlord, his power of purchasing the labour, or the produce of the labour of other people.
写作是我唯一坚持做过的事情，除了结婚。
永远不要让年龄成为学习或发现的障碍。
我相信，一个真正有才华的人，是不会被埋没的。