Someone asked, "How can good be promoted in the world?" I said, "Through teachers." "How is that?" I said, "In human nature there are only strength, weakness, good, evil, and the Mean." The questioner did not understand. I explained, "Righteousness, uprightness, decisiveness, strictness, and firmness of action are examples of strength that is good, and fierceness, narrow-mindedness, and violence are examples of strength that is evil Kindness, mildness, and humility are examples of weakness that is good, and softness, indecision, and perverseness are examples of weakness that is evil. Only the Mean brings harmony. The Mean is the principle of regularity, the universally recognized law of morality, and is that to which the sage is devoted. Therefore the sage institutes education so as to enable people to transform their evil by themselves, to arrive at the Mean and to rest there. Therefore those who are the first to be enlightened should instruct those who are slower in attaining enlightenment, and the ignorant should seek help from those who understand. Thus the way of teachers is established.

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