Page:Sun Tzu on The art of war.djvu/100

Rh 7. You can be sure of succeding [sic] in your attacks if you only attack places which are undefended.
 * 1) 

You can ensure the safety of your defence if you only hold positions that cannot be attacked.

8. Hence that general is skilful in attack whose opponent does not know what to defend; and he is skilful in defence whose opponent does not know what to attack.