By three methods we may learn wisdom: First, by reflection, which is noblest; Second, by imitation, which is easiest; and third by experience, which is the bitterest.
I do not enlighten those who are not eager to learn, nor arouse those who are not anxious to give an explanation themselves. If I have presented one corner of the square and they cannot come back to me with the other three, I should not go over the points again.
Because the newer methods of treatment are good, it does not follow that the old ones were bad: for if our honorable and worshipful ancestors had not recovered from their ailments, you and I would not be here today.
What is God-given is called nature; to follow nature is called Tao (the Way); to cultivate the way is called culture. Before joy, anger, sadness and happiness are expressed, they are called the inner self; when they are expressed to the proper degree, they are called harmony. The inner self is the correct foundation of the world, and the harmony is the illustrious Way. When a man has achieved the inner self and harmony, the heaven and earth are orderly and the myriad of things are nourished and grow thereby.
When abroad, behaveto everyone as if interviewing an honored guest; in directing the people, act as if you were assisting at a great sacrafice; DO NOT DO TO OTHERS AS YOU WOULD NOT LIKE DONE TO YOURSELF: so there will be no murmuring against you in the country, and none in the family; your public life will arouse no ill-will nor your private life any resentment.
The failure to cultivate virtue, the failure to examine and analyze what I have learned, the inability to move toward righteousness after being shown the way, the inability to correct my faults-these are the causes of my grief.
The ideal teacher guides his students but does not pull them along; he urges them to go forward and does not suppress them; he opens the way but does not take them to the place.