Opportunities multiply as they are seized.
There is no place where espionage is not possible.
What the ancients called a clever fighter is one who not only wins, but excels in winning with ease.
Those who do not know the plans of competitors cannot prepare alliances. Those who do not know the lay of the land cannot maneuver their forces. Those who do not use local guides cannot take advantage of the ground.
Those whose upper and lower ranks have the same desire are victorious.
The true objective of war is peace.