When you are ignorant of the enemy but know yourself, your chances of winning or losing are equal.
Sun TzuIn all fighting, the direct method may be used for joining battle, but indirect methods will be needed in order to secure victory. Indirect tactics, efficiently applied, are inexhaustible as Heaven and Earth, unending as the flow of rivers and streams; like the sun and moon, they end but to begin anew; like the four seasons, they pass away to return once more.
Sun TzuIf your opponent is of choleric temper, seek to irritate him. Pretend to be weak, that he may grow arrogant.
Sun Tzu