It is a far greater glory to overcome oneself
The Decameron“A far greater one it is to overcome one's self” is the moral hinge of an episode in which King Charles the Old must choose between possessing two young women he desires and acting honorably toward the gentleman who has received him as a guest. The expression contrasts victory over an external enemy with mastery of appetite: the king’s decisive achievement is not another conquest, but refusing to make desire an excuse for betrayal.
The Expression in Context
Count Guy de Montfort speaks the words while reproving the king for his intention to take both daughters from their father. The household has shown Charles exceptional trust and hospitality; the women’s appearance before him in a manner that leaves them nearly naked is, Guy argues, evidence of that confidence, not an invitation to exploit it. To seize them would turn a host’s honor and hope into the occasion of his injury.
Guy sets the king’s desire against the political circumstances of his rule. Charles still wears his armor in a newly won kingdom, among people he does not know and who may be treacherous; grave affairs demand his attention. For a king in such a position to make room for the “allurements of love,” Guy says, resembles the behavior of a pusillanimous boy rather than a magnanimous ruler. The rebuke therefore makes private appetite a public question: the king’s conduct toward a trusting host would affect what his subjects could understand royal justice to mean.
Conquest Recast as Self-Mastery
The expression’s force comes from its deliberate comparison with Charles’s defeat of Manfred. Guy recalls that Manfred’s violence against women helped open Charles’s way into the kingdom. If Charles now commits a comparable wrong against a man who has hospitably received him, he would contradict the conduct that helped legitimate his own victory. Political triumph cannot excuse the betrayal; it makes the contradiction more glaring.
Guy’s counsel culminates in the distinction that gives the saying its shape: “it was an exceedingly great glory to you to have overcome Manfred, but a far greater one it is to overcome one's self.” The parallel makes the second victory the harder and more honorable one. It also recasts kingship as a discipline exercised inwardly: Charles must govern the appetite that, if indulged, would make him resemble the predatory ruler he overcame. The issue is not simply whether he can take what he desires, but whether he can refuse to treat power as permission.
The King’s Response and the Principle Enacted
The words strike Charles’s conscience because he knows them to be true. After sighing, he acknowledges that even a well-trained warrior may find every other enemy easier to overcome than his own appetites. Guy’s speech has turned a maxim into a demand for action: Charles promises to show by deed that he can master himself as he has mastered others.
He returns to Naples and chooses a practical means of avoiding dishonor as well as repaying his host’s hospitality. With the father’s agreement, he arranges distinguished marriages for the two women, dowering them magnificently and treating them not merely as his host’s daughters but as his own. He gives them to noble cavaliers, though consigning the women he loves to other husbands causes him profound distress. He then goes into Apulia and, through continued exertion, subdues his passion; the account says he remains free of it for the rest of his life.
Significance
The narrator anticipates the objection that arranging two marriages is a small achievement for a king, and concedes that the act considered by itself might seem so. Its importance lies instead in the circumstance: Charles is in love, gives up the women he most desires, and receives no share of that love—not even its “leaf or flower or fruit.” The expression thus measures virtue by what the king relinquishes, not by the authority or resources he commands.
The episode also joins self-command to hospitality and political legitimacy. Charles honors the trust placed in him, compensates his host, and protects the women from being treated as prizes of royal appetite. His restraint does not erase his desire; the story emphasizes the pain of sending them to others. That cost is precisely what makes the phrase more than a convenient lesson: the victory over Manfred is followed by a harder victory within the victor himself.