Birds rising in flight is a sign that the enemy is lying in ambush; when the wild animals are startled and flee he is trying to take you unaware.

First learn to become invincible, then wait for your enemy's moment of vulnerability.

If your enemy is superior, evade him

Victory comes from finding opportunities in problems.

Concentrate your energy and hoard your strength.

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.

So it is that good warriors take their stance on ground where they cannot lose, and do not overlook conditions that make an opponent prone to defeat.