The superior man is distressed by his want (lack) of ability

Do not impose on others what you yourself do not desire.

The silent treasuring up of knowledge; learning without satiety; and instructing others without being wearied: which one of these things belongs to me?

If I hold up one corner of a square and the student cannot workout the other three for himself, I won't go any further.

Reviewing the day's lessons. Isn't it joyful? Friends come from far. Isn't it delightful? One has never been angry at other's misunderstanding. Isn't he a respectable man?

An angry person is always full of poison.

Base yourself in loyalty and trust. Don't be companion with those who are not your moral equal. When you make a mistake, don't hesitate to correct it.