Amid the turmoil and tumult of battle, there may be seeming disorder and yet no real disorder at all.

Secret operations are essential in war; upon them the army relies to make its every move.

Those skilled at making the enemy move do so by creating a situation to which he must conform; they entice him with something he is certain to take, and with lures of ostensible profit they await him in strength.

All men can see these tactics whereby I conquer, but what none can see is the strategy out of which victory is evolved.

What the ancients called a clever fighter is one who not only wins, but excels in winning with ease.

Be subtle! be subtle! and use your spies for every kind of business.

The end and aim of spying in all its five varieties is knowledge of the enemy; and this knowledge can only be derived, in the first instance, from the converted spy. Hence it is essential that the converted spy be treated with the utmost liberality.