We live in circumstances that are so far beyond our own control, and so often we fight them relentlessly, only to lose and become bitter and miserable because they are beyond our control.
Epictetus offers freedom to every one of us:
determine for yourself, he says, what is yours and what is beyond your control, and then work and care only for the things that are yours, and you will always be free.
What is ours?
Our minds, our thoughts, our actions, our intellectual pursuits. If we cultivate those things, nobody can ever take away our freedom.