Therefore I say: know the enemy and know yourself; in a hundred battles you will never be in peril. When you are ignorant of the enemy but know yourself, your chances of winning or losing are equal. If ignorant both of your enemy and of yourself, you are certain in every battle to be in peril.

The control of large numbers is possible, and like unto that of small numbers, if we subdivide them.

According to my assessment, even if you have many more troops than others, how can that help you to victory?

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.

Quickness is the essence of the war.

Know the enemy and know yourself; in a hundred battles you will never peril.

What the ancients called a clever fighter is one who not only wins, but excels in winning with ease.