Any person capable of angering you becomes your master; he can anger you only when you permit yourself to be disturbed by him.

We can't control the impressions others form about us, and the effort to do so only debases our character.

Some things are in our control and others not. Things in our control are opinion, pursuit, desire, aversion, and, in a word, whatever are our own actions. Things not in our control are body, property, reputation, command, and, in one word, whatever are not our own actions.

Consider first the nature of the business in hand; then examine thy own nature, whether thou hast strength to undertake it.

Difficulties are things that show a person what they are.

Nothing outside the will can hinder or harm the will; it can only harm itself. If then we accept this, and, when things go amiss, are inclined to blame ourselves, remembering that judgment alone can disturb our peace and constancy, I swear to you by all the gods that we have made progress.

We are not to give credit to the many, who say that none ought to be educated but the free; but rather to the philosophers, who say that the well-educated alone are free.