Sun Tzu Quote

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.

The art of war (ed. Shambhala Pubns, 1991) - ISBN: 9780877735373