Proverbs 29:11

"A fool gives full vent to his spirit, 
but a wise man quietly holds it back."

I think it's useful when you

1. have been wronged or are in danger
2. need to act
3. need to avoid thinking about the consequences

In modern life it tends to be less useful because we're often not in danger. IME it's almost more often that people get angry when they:

1. want to act
2. want to avoid thinking about the consequences

Then after they fact they manufacture how they've been wronged.

it is a futile display of self-righteousness, that's what I always tell people when they ask me why I'm never angry.

what's the purpose?

I would have said stupidity, which is why I do my best to not get angry, but it's only half right. It's a particular kind of stupidity.

SimpleStacker

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saloon

When I asked a friend, with lots of experience and self-awareness, what the defining characteristic of anger is, he said self-righteousness.