We have a collection of 3 Happiness quotes from Epictetus
"There is only one way to happiness and that is to cease worrying about things which are beyond the power of our will." (ID 54275)
"The essence of philosophy is that a man should so live that his happiness shall depend as little as possible on external things." (ID 54444)
"If virtue promises happiness, prosperity and peace, then progress in virtue is progress in each of these for to whatever point the perfection of anything brings us, progress is always an approach toward it." (ID 54609)