“Just as what is considered rational or irrational differs for each person, in the same way what is good or evil and useful or useless differs for each person. This is why we need education, so that we might learn how to adjust our preconceived notions of the rational and irrational in harmony with nature. In sorting this out, we don’t simply rely on our estimate of the value of external things, but also apply the rule of what is in keeping with one’s character.” —EPICTETUS, DISCOURSES, 1.2.5–7
