If you remain with me, you must bear in mind in future that you are my aides-de-camp, and that your sole duty here is to carry my orders, and not to fight like troopers in a battle.

It is through hotheadedness of this sort that battles are lost.
A general, without officers to carry his orders, can do nothing towards controlling the movements of his troops in battle, of following up a victory or covering a defeat." The two young officers hung their heads and murmured their excuses.
"Enough, gentlemen," Turenne said.

"I am perfectly aware that it was your ardour that carried you away, but ardour is a bad leader.

Over and over again the ardour of cavalry to pursue the troops they have defeated has brought about the loss of a battle.

Courage is a virtue, and most soldiers possess it, but steadiness and coolness are rarer and more useful, and on the part of officers on a general's staff are absolutely indispensable.