Page:Sun Tzu on The art of war.djvu/229

Rh 25. The end and aim of spying in all its five varieties is knowledge of the enemy;
 * 1) 

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.

26. Of old, the rise of the Yin dynasty

was due to I Chih