政策制定者应乐于根据新证据修正他们的观点。

没有什么目标是高不可攀的，但人必须小心而自信地攀登。

不只是国家有染的问题，对士而言也有受到熏染的问题。 

A person may cause evil to others not only by his actions but by his inaction， and in either case， he is justly accountable to them for the injury.

没有目的的创新只是噪音。