Our (the Stoics’) opinion is, that anger can venture upon nothing by itself, without the approval of mind: for to conceive the idea of a wrong having been done, to long to avenge it, and to join the two propositions, that we ought not to have been injured and that it is our duty to avenge our injuries, cannot belong to a mere impulse which is excited without our consent. That impulse is a simple act; this is a complex one, and composed of several parts. The man understands something to have happened: he becomes indignant thereat: he condemns the deed; and he avenges it. All these things cannot be done without his mind agreeing to those matters which touched him.