Moral virtue is a mean that lies between two vices, one of excess and the other of deficiency, and... it aims at hitting both in feelings and actions. So it is hard to be good, for surely it is hard in each instance to find the mean, just as it is hard to find the center of a circle. It is easy to get angry or to spend money - anyone can do that. But to act in the right way toward the right person, in due proportion, at the right time, for the right reason, and in the right manner - that is not easy, and not everyone can do it.
Aristotle, 384 - 322 BCE