Any person capable of angering you becomes your master; he can anger you only when you permit yourself to be disturbed by him.
EpictetusTo know that you do not know and to be willing to admit that you do not know without sheepishly apologizing is real strength and sets the stage for learning and progress in any endeavor.
EpictetusWe 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.
EpictetusIf you do not wish to be prone to anger, do not feed the habit; give it nothing which may tend to its increase. At first, keep quiet and count the days when you were not angry: "I used to be angry every day, then every other day: next, every two, then every three days!" and if you succeed in passing thirty days, sacrifice to the gods in thanksgiving.
Epictetus