Good medicine is bitter to the mouth, but has an effect on the disease. Faithful words hurt one's ears, but have value for one's conduct.

In the Wu Tzu it says: 'He who would save his life shall lose it, and he who would give up his life shall save it.'

The man who hunts a deer does not gaze at the mountains.

When one would make a surprise attack on the enemy, he should avoid the major roads and seek out the lesser ones. Then attack.

One must not be negligent in learning. In the Lun Yu it says: "To study and not to think is darkness. To think without study is dangerous."

One's soldier should not abuse the enemy. 'Arouse a bee and it will come at you with the force of a dragon.

One must never be perfidious to his master. In the Lun Yu it says: One should act according to the way even in times of haste. One should act according to the way even in times of danger. It says further: 'When one is serving his master, he should exert himself.'