Franklin cuts past the flattering notion that we're the sum of our virtues—he's reminding us that character is fundamentally *comparative*, a balance sheet rather than a ledger of assets alone. A person of genuine kindness who carries the bad habit of dishonesty in small matters finds that integrity leaking away like water from a cracked vessel; the good doesn't erase the bad, they genuinely subtract from one another. This matters because it explains why someone might volunteer at a shelter on weekends yet lose friendships through chronic unreliability—the math doesn't add up the way we'd like it to. We tend to count our good intentions as if they're currency, when really only the *net* amount determines how others experience us.