All things are composed of four elements – Earth, Water, Fire, and Air.”

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.

你必须愿意适应，否则就会被抛在后面。

Natural gas is a versatile fuel that can support renewable energy growth by providing reliability when the sun isn't shining and the wind isn't blowing.

思考的过程不是一系列分离的步骤，而是结构转换的连续流动。