Sun Tzu quotes from the book the art of war
If you know your enemy and you know yourself you need not fear the results of a hundred battles. If you know yourself but not the enemy for every victory gained you will also suffer a defeat. If you know neither the enemy nor yourself you will succumb in every battle.
What the ancients called a clever fighter is one who not only wins, but excels in winning with ease.
To know your Enemy, you must become your Enemy..
Management of many is the same as management of few. It is a matter of organization.
He who knows when he can fight and when he cannot will be victorious.