“Get busy with life’s purpose, toss aside empty hopes, get active in your own rescue — if you care for yourself at all — and do it while you can.”

— Marcus Aurelius

Does being a Stoic mean you can be apathetic? Does not reacting mean that you just give up? Because Stoicism is about controlling your response, it can easily seem that you just let things just happen and don’t take action. But to be a true Stoic, you are the opposite of apathetic. You are effective. By taking the time to choose your shot, you don’t waste time or energy on the things you can’t control. 
Often, we confuse action with actually doing something useful. Because Stoicism is about taking responsibility for ourselves, we need to be smart about the actions we choose. When we take the time to make a deliberate and well thought out choice. We want to be effective, not busy.