who wishes to fight must first count the cost

Rouse him, and learn the principle of his activity or inactivity. Force him to reveal himself, so as to find out his vulnerable spots.

Attack is the secret of defense; defense is the planning of an attack.

There are roads which must not be followed, armies which must not be attacked, towns which must not be besieged, positions which must not be contested, commands of the sovereign which must not be obeyed.

Great results, can be achieved with small forces.

Move not unless you see an advantage; use not your troops unless there is something to be gained; fight not unless the position is critical.

The whole secret lies in confusing the enemy, so that he cannot fathom our real intent.

If your opponent is of choleric temper,  seek to irritate him.  Pretend to be weak, that he may grow arrogant.

He will win who, prepared himself, waits to take the enemy unprepared.