Too frequent rewards indicate that the general is at the end of his resources; too frequent punishments that he is in acute distress.

There is no place where espionage is not possible.

O divine art of subtlety and secrecy!

It is the rule in war, if our forces are ten to the enemy's one, to surround him; if five to one, to attack him; if twice as numerous, to divide our army into two.

To plan secretly, to move surreptitiously, to foil the enemy's intentions and balk his schemes, so that at last the day may be won without shedding a drop of blood.

When you do battle, even if you are winning, if you continue for a long time it will dull your forces and blunt you edge...If you keep your armies out in the field for a long time, your supplies will be insufficient. Transportation of provisions itself consumes 20 times the amount transported.

Know thy self, know thy enemy. A thousand battles, a thousand victories.