You can be invincible, if you enter into no contest in which it is not
in your power to conquer. Take care then when you observe a man honored
before others or possessed of great power or highly esteemed for any
reason, not to suppose him happy, and be not carried away by the
appearance. For if the nature of the good is in our power, neither envy
nor jealousy will have a place in us. But you yourself will not wish to
be a general or senator ([Greek: prutanis]) or consul, but a free man:
and there is only one way to this, to despise (care not for) the things
which are not in our power.