Against those skilled in attack, an enemy does not know where to defend; against the experts in defense, the enemy does not know where to attack.
Sun TzuThe difficulty of tactical maneuvering consists in turning the devious into the direct, and misfortune into gain.
Sun TzuThe essential factor of military success is speed, that is taking advantage of others' unpreparedness or lack of foresight, their failure to catch up, going by routes they do not expect, attacking where they are not on guard. This you cannot accomplish with hesitation.
Sun Tzu