The proper man understands equity, the small man profits. The perfecting of one's self is the fundamental base of all progress and all moral development. Only the wisest and the stupidest of men never change. Learning without thought is labor lost; and thought without learning is perilous. Between friends, frequent reproofs make the friendship distant. It is not possible for one to teach others who cannot teach his own family. When you are labouring for others let it be with the same zeal as if it were for yourself. If language is not correct, then what is said is not what is meant; if what is said is not what is meant, then what must be done remains undone; if this remains undone, morals and art will deteriorate; if justice goes astray, the people will stand about in helpless confusion. Hence there must be no arbitrariness in what is said. This matters above everything. If I am walking with two other men, each of them I will serve as my teacher. I will pick out the good points of the one and imitate them, and the bad points of the other and correct them in myself. I hear and I forget. I see and I remember. I do and I understand. | 
