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.

One should not utter a word about his own inadequacies. In the Oxo it says: 'When a man lets out a single word, the long and short of him will be known.'

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.

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

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.