The rising of birds in their flight is the sign of an ambuscade. Startled beasts indicate that a sudden attack is coming.

What is of the greatest importance in war is extraordinary speed: One cannot afford to neglect opportunity.

In conflict, straightforward actions generally lead to engagement, surprising actions generally lead to victory.

Management of many is the same as management of few. It is a matter of organization.

Sweat more during peace: bleed less during war

We cannot enter into alliances until we are acquainted with the designs of our neighbors. We are not fit to lead an army on the march unless we are familiar with the face of the country.

The skillful tactician may be likened to the shuai-jan. Now the shuai-jan is a snake that is found in the Ch'ang mountains. Strike at its head, and you will be attacked by its tail; strike at its tail, and you will be attacked by its head; strike at its middle, and you will be attacked by head and tail both.