There is only one way to happiness and that is to cease worrying about things which are beyond the power of our will.
First say to yourself what you would be; and then do what you have to do.
Only the educated are free.
--Epictetus
Stoicism is a school of Hellenistic philosophy founded in Athens by Zeno of Citium in the early 3rd century BC. The Stoics taught that destructive emotions resulted from errors in judgment, and that a sage, or person of "moral and intellectual perfection", would not suffer such emotions.[1]
