Yin and yang, male and female, strong and weak, rigid and tender, heaven and earth, light and darkness, thunder and lightning, cold and warmth, good and evil...the interplay of opposite principles constitutes the universe.

Those who make virtue their profession are the ruin of virtue.

Tzu Chang asked Confucius about jen. Confucius said, "If you can practice these five things with all the people, you can be called jen." Tzu Chang asked what they were. Confucius said, "Courtesy, generosity, honesty, persistence, and kindness. If you are courteous, you will not be disrespected; if you are generous, you will gain everything. If you are honest, people will rely on you. If you are persistent you will get results. If you are kind, you can employ people.

He who learns but does not think, is lost. He who thinks but does not learn is in great danger.

What the great learning teaches, is to illustrate illustrious virtue; to renovate the people; and to rest in the highest excellence.

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.

He who fails to prepare, prepares to fail