Page:The book of war, the military classic of the Far East (IA bookofwarmilitar00caltiala).pdf/78

74 Likewise during the foundation of the state of Chu, Luya lived among the people of Shang.

Wherefore, intelligent rulers and wise generals use the cleverest men as spies, and invariably acquire great merit. The spy is a necessity to the army. Upon him the movement of the army depends.