If asked how to cope with a great host of the enemy in orderly array and on the point of marching to the attack, I should say: "Begin by seizing something which your opponent holds dear; then he will be amenable to your will." Rapidity is the essence of war: take advantage of the enemy's unreadiness, make your way by unexpected routes, and attack unguarded spots.
Sun TzuThe general who wins the battle makes many calculations in his temple before the battle is fought. The general who loses makes but few calculations beforehand.
Sun TzuThe value of time, that is of being a little ahead of your opponent, often provides greater advantage than superior numbers or greater resources.
Sun Tzu