The height of strategy, is to attack your opponent's strategy.

Rely not on the likelihood of the enemy's not coming, but on our own readiness to receive him

If you fight with all your might, there is a chance of life; where as death is certain if you cling to your corner

Hence the saying: If you know the enemy and you know yourself, your victory will not stand in doubt; if you now Heaven and you know Earth, you may make your victory complete.

Like the sun and moon, they end but to begin anew; like the four seasons, they pass away to return once more.

To perceive victory when it is known to all is not really skilful. Everyone calls victory in battle good, but it is not really good.

When torrential water tosses boulders, it is because of its momentum. When the strike of a hawk breaks the body of its prey, it is because of timing.