Passage Summary: To be a truly good person, you have to achieve moral excellence, which only happens if you keep fighting off bad impulses—a task that remains hard even for the best of us.

Reasoning: Moral excellence requires repeatedly overcoming the urge to do wrong. Becoming a virtuous person requires achieving moral excellence. Overcoming these urges is difficult, even for those who are already virtuous.

Analysis: This is a 'Must Be True' question, so we need to find a valid inference by chaining the conditional statements together. We know: Virtuous -> Moral Excellence -> Overcoming Inclinations. Therefore, being a virtuous person necessitates overcoming inclinations to do the wrong thing. Since the passage explicitly states this process is difficult, we can conclude that being or becoming virtuous involves a difficult struggle against one's own impulses. Look for an answer that synthesizes these requirements into a single logical statement.