The theory of economic development is the study of how the economic system generates the forces which incessantly transform it.
我们都是自己经历的囚徒。
你必须为每一分而战，就像它是最后一分一样。
In this trifling affair， that misunderstandings and neglect occasion more mischief in the world than even malice and wickedness. At all events， the two latter are of less frequent occurrence.
