Every habit and faculty is preserved and increased by its corresponding actions: The habit of walking makes us better walkers, regular running makes us better runners. It is the same regarding matters of the soul. Whenever you are angry, you increase your anger; you have increased a habit and added fuel to a fire.
If you don’t want an angry temper, then don’t feed the habit. Give it nothing to help its increase. Be quiet at first and reckon the days in which you have not been angry. “I used to be angry every day; no every other ay; then every third and fourth day.” As time goes on, the habit is first weakened and is then eventually overridden by a wiser response.
The Art of Living
By Epictetus, Translated by Sharon Lebell