Because you never know what might happen, Stoicism contains an important lesson on not relying on anything that is subject to change. Your bank balance will fluctuate. Friendships come and go. Even the healthiest of relationships can end. Throughout all this change, the only thing with the potential to remain unaffected is ourselves. Every moment of every day, we make a choice as to how we react and respond to things. It is the only real power we have.
