In desperate position, you must fight.
Where the army is, prices are high; when prices rise the wealth of the people is exhausted.
In a position of this sort, even though the enemy should offer us an attractive bait, it will be advisable not to stir forth, but rather to retreat, thus enticing the enemy in his turn; then, when part of his army has come out, we may deliver our attack with advantage.
Without local guides, your enemy employs the land as a weapon against you.
Who does not know the evils of war cannot appreciate its benefits.
What is essential in war is victory, not prolonged operations.