Opportunities multiply as they are seized.

Without harmony in the State, no military expedition can be undertaken; without harmony in the army, no battle array can be formed.

He must be able to mystify his officers and men by false reports and appearances, and thus keep them in total ignorance.

With regard to ground of this nature, be before the enemy in occupying the raised and sunny spots, and carefully guard your line of supplies. Then you will be able to fight with advantage.

Nothing is more difficult than the art of maneuver. What is difficult about maneuver is to make the devious route the most direct and to turn misfortune to advantage.

If it is to your advantage, make a forward move; if not, stay where you are.

The opportunity of defeating the enemy is provided by the enemy himself.