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

Unhappy is the fate of one who tries to win his battles and succeed in his attacks without cultivating the spirit of enterprise, for the result is waste of time and general stagnation.

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

And regulation entails organizational effectiveness, a chain of command, and a structure for logistical support.

Who can determine where one ends and the other begins?

Perfection in war lies in so sapping your opponents will that he surrenders without fighting.

When the leader is morally weak and his discipline not strict, when his instructions and guidance are not enlightened, when there are no consistent rules, neighboring rulers will take advantage of this.