The most harm of all is done when power is in the hands of people who are absolutely persuaded of the purity of their instincts and intentions.

Certainty is the most dangerous weapon

We tend to think the most dangerous people are those who openly admit they're corrupt or selfish. But history suggests the real threat comes from people who've convinced themselves they're acting purely for the greater good. A manager who cuts jobs "for the company's future," a parent who controls their adult child "out of love," a politician who suppresses dissent "to protect the nation"—they often genuinely believe in their own righteousness. That certainty removes the internal braking system most of us have.

The trap is that certainty feels good. It's psychologically comfortable to believe your motives are pure, which makes it easy to justify almost anything. You stop questioning yourself. You dismiss critics as misguided rather than listening to them. You ignore evidence that contradicts your worldview because obviously you know best. This isn't about malicious villains—it's about decent people who've lost the ability to doubt themselves.

The antidote isn't cynicism or suspicion of everyone in power. It's recognizing that your own good intentions don't guarantee good outcomes. The most trustworthy people aren't those who claim perfect motives—they're the ones who remain skeptical of their own judgment, who actively seek out opposing viewpoints, and who stay open to being wrong.