Freedom of men under government is to have a standing rule to live by, common to everyone, and not to be subject to the inconstant, uncertain, arbitrary will of another man.

Liberty cannot be preserved without a general knowledge among the people.

The whole art of teaching is only the art of awakening the natural curiosity of young minds for the purpose of satisfying it afterwards.

置身于是非之外，评断是非才能客观；置身于利害之外，才能看清利害的变化。