For it is not death or pain that is to be feared, but the fear of pain or death. - Epictetus

Of all existing things some are in our power, and others are not in our power. In our power are thought, impulse, will to get and will to avoid, and, in a word, everything which is our own doing. Things not in our power include the body, property, reputation, office, and, in a word, everything which is not our own doing. Things in our power are by nature free, unhindered, untrammelled; things not in our power are weak, servile, subject to hindrance, dependent on others.

-….when things seem to have reached that stage, merely say “I won’t play any longer”, and take your departure; but if you stay, stop lamenting.

It is the act of an ill-instructed man to blame others for his own bad condition; it is the act of one who has begun to be instructed, to lay the blame on himself; and of one whose instruction is completed, neither to blame another, nor himself. (5) [tr. George Long (1888)].