It is sufficient to estimate the enemy situation correctly and to concentrate your strength to capture him. There is no more to it than this. He who lacks foresight and underestimates his enemy will surely be captured by him.

Appear at points which the enemy must hasten to defend; march swiftly to places where you are not expected.

Maneuvering with an army is advantageous; with an undisciplined multitude, most dangerous.

It is a doctrine of war not to assume the enemy will not come, but rather to rely on one's readiness to meet him; not to presume that he will not attack, but rather to make one's self invincible.

Therefore, just as water retains no constant shape, so in warfare there are no constant conditions.

When a general, unable to estimate the enemy's strength, allows an inferior force to engage a larger one, or hurls a weak detachment against a powerful one, and neglects to place picked soldiers in the front rank, the result must be rout.

If you know yourself but not the enemy, for every victory gained you will also suffer a defeat.