Why is Captain Renaud considered a powerful portrait of human greatness?

In Alfred-Victor de Vigny’s work Servitude et grandeur militaires (1835), the character of Captain Renaud is presented as a profound portrait of human greatness because he embodies the inherent dignity and suffering of the soldier.1

Vigny explores the moral conflict of the military profession, where an individual is simultaneously obligated to kill and condemned to a life of passive obedience. Captain Renaud, an old Napoleonic soldier, serves as a symbol of this "tormented conscience"—a man who detests the violence of war yet continues to serve with energy and commitment. Through this character, Vigny illustrates his broader philosophical interest in the "humiliated greatness" of those bound by duty, reflecting his own soul’s struggle with moral scruples and the tragic nature of human existence.12