There is no place where espionage is not possible.

If you are strong, appear weak. But if you are weak, appear strong.

Act after having made assessments. The one who first knows the measure of far and near wins - this is the rule of armed struggle.

All war is based on deception.

When the position is such that neither side will gain by making the first move, it is called temporising ground.

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.

A battle avoided cannot be lost.