Epictetus summarizes the ultimate goals of Stoic philosophy in two words that capture both internal and external liberation. Tranquility (ataraxia) represents inner peace - the ability to remain calm and centered regardless of external circumstances. Freedom represents liberation from the tyranny of things beyond our control - we stop being enslaved by other people's opinions, external events, or our own destructive emotions. Together, these create a life of dignity and peace, where we respond to challenges from a place of strength rather than reactivity, and where our happiness depends on our character rather than our circumstances.