Page "Epictetus" Paragraph 21

It is only our opinions and principles that can render us unhappy, and it is only the ignorant person that finds fault with another.

Every desire degrades us, and renders us slaves of what we desire.

We ought not to forget the transitory character of all external advantages, even in the midst of our enjoyment of them ; but always to bear in mind that they are not our own, and that therefore they do not properly belong to us.

Thus prepared, we shall never be carried away by opinions.