With regard to precipitous heights, if you are beforehand with your adversary, you should occupy the raised and sunny spots, and there wait for him to come up.

If the enemy leaves a door open, you must rush in.

Pretend to be weak, so your enemy may grow arrogant.

What enables the wise sovereign and the good general to strike and conquer, and achieve things beyond the reach of ordinary men, is foreknowledge.

Attack where he is unprepared; sally forth when he does not expect you.

In the midst of chaos, there is also opportunity.

The natural formation of the country is the soldier's best ally; but a power of estimating the adversary, of controlling the forces of victory, and of shrewdly calculating difficulties, dangers and distances, constitutes the test of a great general.