Epictetus

“No man is free who is not master of himself.”

“Make the best use of what is in your power, and take the rest as it happens.”

“He is a wise man who does not grieve for the things which he has not, but rejoices for those which he has.”

“The key is to keep company only with people who uplift you, whose presence calls forth your best.”

“Freedom is the only worthy goal in life. It is won by disregarding things that lie beyond our control.”

“Don't explain your philosophy. Embody it.”

“Some things are in our control and others not.”

“Things in our control are opinion, pursuit, desire, aversion — whatever are our own actions.”

“Things not in our control are body, property, reputation, command — whatever are not our own actions.”

“The chief task in life is to identify and separate matters so that I can say clearly which are externals not under my control, and which have to do with the choices I actually control.”

“Where then do I look for good and evil? Not to externals, but to my own choices.”

“It is not events themselves that disturb people, but only their judgments about them.”

“When we are hindered, or disturbed, or grieved, let us never blame anyone but ourselves — that is, our own opinions.”

“To accuse others for one's own misfortunes is a sign of want of education.”

“To accuse oneself shows that one's education has begun.”

“To accuse neither oneself nor others shows that one's education is complete.”

“Be not elated at any excellence which is not your own.”

“If a horse should be elated and say, 'I am handsome,' it would be tolerable. But when you are elated and say, 'I have a handsome horse,' know that you are elated only on the merit of the horse.”

“It's not what happens to you, but how you react to it that matters.”