From “The Art of War” by Sun Tzu
Victory is the main object in war. If this is long delayed, weapons are blunted and morale depressed.
When your weapons are dulled and ardour damped, your strength exhausted and treasure spent, neighboring rulers will take advantage of your distress to act. And even though you have wise counselors, none will be able to lay good plans for the future.
For there has never been a protracted war from which a country has benefited.
War is like unto fire; those who will not put aside weapons are themselves consumed by them.
Thus those unable to understand the dangers inherent in employing troops are equally unable to understand the advantageous ways of doing so.