What then is education?
Education is the learning how to adapt natural intuition to the particular things that conform to nature; and then to distinguish those things which are in our power, and the others that are not in our power and so we can see that will and acts of will are really not in our power because they are dependent upon another doing what we “will”.
This makes many parts of the body, all of our possessions, parents, brothers, children, country, and, generally, all with whom we live in society are not within our will and so are not in our power.
–Epictetus, The Discourses