In a departure from traditional political idealism, the author argues that a prince must learn how to be 'not good' and use vice when necessary for the preservation of the state. He contends that a man who tries to be virtuous in all circumstances will inevitably be ruined by the many who are not virtuous.
CHAPTER XV. CONCERNING THINGS FOR WHICH MEN, AND ESPECIALLY PRINCES, ARE PRAISED OR BLAMED

A prescription for rulers to prioritize political reality over idealism, emphasizing that a prince must learn how to be immoral when necessity demands it.

The author argues that while it is ideal for a prince to possess all virtuous qualities, human nature makes this impossible; therefore, a ruler must be prudent enough to avoid vices that threaten his state while embracing those necessary for its preservation.

Machiavelli advises that a reputation for liberality is often self-defeating, as it leads to the exhaustion of resources and the eventual oppression of subjects through taxation. He concludes that a wise prince should not fear a reputation for meanness, as parsimony ensures the financial stability necessary for defense and effective governance.

The author advises princes to prioritize a reputation for frugality over liberality, as excessive generosity eventually requires heavy taxation that breeds hatred.