What does this Epictetus quote mean - man is free who not master of

This quote, often attributed to the Stoic philosopher Epictetus, can be interpreted in several ways. One possible interpretation is that true freedom lies not in external circumstances or possessions, but in the mastery over one's own mind and emotions. In stoicism, this mastery is achieved through the practice of virtue, self-discipline, and acceptance of things that are beyond our control. Thus, a person who is not a slave to their desires, fear, or external events can be considered truly free.