Can anger be spiritually useful?

The following excerpt is from a samvaad (dialogue) session with Acharya Prashant.

Questioner (Q): Acharya Ji, we use anger as a weapon and it’s a weakness too. How to stop anger from becoming a weakness and why do we get angry?

Acharya Prashant (AP): When the desire is not fulfilled Parul (Questioner) then one gets angry, you know that. So, it’s not about anger. It’s about the quality of the desire. What is your desire about? What’s the object of your desire? So, anger is related to desire and desire is always about an object.

Tell me what do you want?

If you want the right thing; wonderful.

If you don’t want the right thing; awful.

It’s not about anger at all. Anger is a misplaced subject of discussion and so much has been said about anger. People keep talking of therapies related to anger. People keep talking of anger as some kind of affliction. Somebody gets angry, he is called psychotic.

Is it about anger or is it about what you want? Yes? What do you want Parul (Questioner)?

And remember that there is such a thing which if wanted, leads to total freedom from all desires and therefore anger.

There are things that you want and do not get. There are things that you want and you get…