Full Idea
It is easy to get angry - anyone can do that - but to feel or act towards the right person to the right extent at the right time for the right reason in the right way - that is not easy, and it is not everyone that can do it.
Gist of Idea
To make one's anger exactly appropriate to a situation is very difficult
Source
Aristotle (Nicomachean Ethics [c.334 BCE], 1109a26)
Book Reference
Aristotle: 'Ethics (Nicomachean)', ed/tr. ThomsonJ A K/TredennickH [Penguin 1976], p.109
A Reaction
This shows clearly that Aristotle's doctrine of the mean is NOT the same as the virtue of temperance (as Nietzsche seemed to think). Appropriate anger could be very forceful indeed, and bravery might be quite extreme in a particular crisis.