Ground which can be freely traversed by both sides is called accessible.

As water has no constant form, there are in war no constant conditions.

The value of time, that is of being a little ahead of your opponent, often provides greater advantage than superior numbers or greater resources.

If we do not wish to fight, we can prevent the enemy from engaging us even though the lines of our encampment be merely traced out on the ground. All we need to do is to throw something odd and unaccountable in his way.

In all fighting, the direct method may be used for joining battle, but indirect methods will be needed in order to secure victory. In battle, there are not more than two methods of attack.. the direct and the indirect; yet these two in combination give rise to an endless series of maneuvers.

Unless you enter the tiger's lair, you cannot get hold of the tiger's cub's.

If you know the enemy and know yourself, you need not fear the result of a hundred battles. If you know yourself but not the enemy, for every victory gained you will also suffer a defeat. If you know neither the enemy nor yourself, you will succumb in every battle.