Secret operations are essential in war; upon them the army relies to make its every move.
Victory comes from finding opportunities in problems.
Invincibility lies in the defense; the possibility of victory in the attack.
Weigh the situation, then move.
What the ancients called a clever fighter is one who not only wins, but excels in winning with ease.
The control of large numbers is possible, and like unto that of small numbers, if we subdivide them.