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.
科学不仅仅是事实的集合；它是一种思考方式。
不断思考你如何能做得更好，并不断质疑自己。
艺术不是反映现实的镜子，而是塑造现实的锤子。