“There is only one way to happiness, and that is to cease worrying about things which are beyond the power of our will. “
“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.”
-Epictetus-
Nature and Mind 