I have to confess I can be a complete asshole sometimes. I don’t deny it. I have a fierce temper. Today I got mad at something–Round umpteen of the same problem–and was sitting at lunch trying to calm down. It occurred to me that the physical aggression of anger is not that different from anxiety. In both cases you are excited, except that instead of being afraid someone is going to hurt you, you are afraid you are going to hurt someone.
This is an interesting insight. All the emotions exist on a continuum with one another, and have both physiological AND cognitive components.
I’m researching something, and will post if my supposition is correct.