The Essentials of Triumph

There are Five ways triumph can be known:

Those who know when to challenge and when to not to challenge will triumph.
Those who recognize how to use the nomerous and the few will triumph.
Those who agree on superior and inferior objectives will triumph.
Those who prepare to lie in wait for the unprepared will triumph.
Those who lead without interference from a Ruler will triumph.

Those who know these Five, as well as the Tao, will triumph.

Thus, its said:

“Know the other and know yourself:
One hundred challenges witout danger;
Know not the other and yet know yourself:
One triumph for one defeat;
Know not the other and know not your self:
Every challenge is certain peril.”

The Art of War by Sun Tsu

The Art of Strategy: The Leading Modern Translation of Sun Tzu’s Classic The Art of War
by R.L. Wing
ISBN: 0722534884

p. 51