Machiavelli offers a high appraisal of Duke Valentino's actions, presenting him as a model for any new prince who must secure a state through a combination of force, fraud, and strategic severity. He suggests that the Duke's ultimate failure was due to external misfortune rather than a lack of political or military foresight.
CHAPTER VIII. CONCERNING THOSE WHO HAVE OBTAINED A PRINCIPALITY BY WICKEDNESS

The text highlights that while a leader may rise to power through sheer merit and military struggle rather than luck, the use of immoral methods like betrayal and murder precludes the achievement of true glory.

The author distinguishes between the acquisition of power and the attainment of glory, noting that while ruthless cruelty can secure an empire, it prevents a leader from being celebrated as truly excellent.

The author argues that cruelty can be 'well-used' if it is applied once for security and then converted into benefits for the subjects, rather than persisted in over time.

The author advises that a usurper should commit all necessary cruelties at once to allow subjects to forget them, while dispensing benefits slowly to ensure they are savored.