There are two things a person should never be angry at, what they can help, and what they cannot.

Anger only works if something can change

This quote catches something tricky about anger that we live with every day. We tend to get furious at the exact moments when it's least useful—either we're mad at someone for something they genuinely couldn't control, or we're stewing over our own mistakes as if rage might somehow undo them. Neither one makes logical sense, yet we do both constantly.

The insight works because it cuts through the feel-good stuff about "letting go" and points to pure practicality. If someone can actually change what you're upset about, then anger might fuel action—but often we just stay mad and expect it to work like magic. And if they can't change it? Getting angry is like yelling at the weather. It won't make it rain less; it just ruins your day and probably someone else's too.

What's easy to miss is that this applies brutally to ourselves. We beat ourselves up over choices we can't remake, or things about our circumstances that are simply fixed. The anger feels productive because it feels like taking ourselves seriously, but Plato's point is that it's just noise. The only anger that ever deserves real estate in your head is the kind that might actually move you toward something better.