"This gave Marius time to toughen the bodies of his men and improve their morale and – most important of all – to make them understand what sort of man he was himself.  That fierce manner of his in command and his inflexibility in imposing punishments seemed to them, once they got the habit of discipline and obedience, not only right and proper but a positive advantage.  His angry temper, rough voice and that forbidding expression with which they gradually grew familiar, seemed more terrible to the enemy than to themselves."

- Plutarch, Life of Marius