The quality of decision is like the well-timed swoop of a falcon which enables it to strike and destroy its victim.
Hostile armies may face each other for years, striving for the victory which is decided in a single day. This being so, to remain in ignorance of the enemy's condition simply because one grudges the outlay of a hundred ounces of silver in honors and emoluments, is the height of inhumanity.
If you are far from the enemy, make him believe you are near.
Great results, can be achieved with small forces.
Appear weak when you are strong, and strong when you are weak.
Know the enemy and know yourself.