The dichotomy of control: stop worrying about what you can't change

You lie awake replaying a conversation. You check the weather app for the third time before an outdoor event. You wonder what your manager thought of your email. Much of the worry that fills an ordinary week is aimed at things you cannot actually reach.

Nearly two thousand years ago, a teacher named Epictetus offered a simple tool for this. It is sometimes called the dichotomy of control, and it is the first lesson in his Enchiridion, or Handbook. This piece explains what it says, what it does not say, and how to use it on a real worry today.

A former slave’s first lesson

Epictetus was born in the first century CE in Hierapolis, in Asia Minor, and spent part of his life enslaved in Rome. According to the Stanford Encyclopedia of Philosophy, he studied with the Stoic teacher Musonius Rufus, eventually received his freedom, and later ran his own school in Nicopolis, in northwest Greece. His student Arrian wrote down his teaching, and the Enchiridion is a short abridgment of it.

It opens like this, in Thomas Wentworth Higginson’s translation:

“There are things which are within our power, and there are things which are beyond our power.” — Epictetus, Enchiridion 1

Within our power, he goes on, are opinion, aim, desire and aversion: in short, our own inner choices. Beyond it are body, property, reputation and office: things that depend, at least in part, on the world and on other people.

It is worth noticing who is saying this. Epictetus knew better than most what it means to have no control over your body, your time or your circumstances. His conclusion was not that he was powerless. It was that one thing could never be taken from him: his capacity to choose how he judged and responded. The Stanford Encyclopedia describes this capacity, which Epictetus called prohairesis (often translated “volition” or “choice”), as the centre of his whole philosophy.

Why it eases worry

Epictetus was blunt about what happens when we mix the two categories up. If you treat things that depend on others as if they were your own, he says, “you will be hindered, you will lament, you will be disturbed.” If you take as your own only what is truly yours, no one can compel or restrict you.

Put in modern terms: worry is most painful when it is attached to something you cannot act on. You can rehearse a job interview, but you cannot decide whether you get the job. You can be kind to a friend, but you cannot choose how they feel about you. When your mind keeps pushing on the part that will not move, it wears you out without changing anything.

Marcus Aurelius, who was heavily influenced by Epictetus, put the next step plainly in his Meditations. When something outside you causes pain, he wrote, “it is not this thing that disturbs thee, but thy own judgment about it. And it is in thy power to wipe out this judgment now” (Meditations VIII.47, George Long’s translation).

What modern research adds

Psychologists have studied a related question for decades: does it help to match how you cope to how controllable a problem is? The “goodness-of-fit” idea says you should problem-solve when you can change a situation and use emotional or meaning-focused coping when you cannot.

The evidence is more mixed than that neat rule suggests. A 2019 systematic review in Health Psychology Review looked at 15 studies of people living with chronic illness and found inconsistent results. Some coping strategies worked better or worse depending on controllability; others did not. Most studies were cross-sectional, so they could not show cause and effect.

A 2024 study in Anxiety, Stress & Coping tested a slightly different idea, and it sounds very Stoic. Among 159 US college students, using more problem-solving for controllable stressors was linked to less stress. But the strongest finding was simpler: students who focused on what they could control in the present reported less stress, over and above how well their coping matched the situation. It was a single, cross-sectional study, so it shows an association rather than proof, but it fits Epictetus’s advice well.

The other half of the dichotomy, accepting what you cannot change, also has a modern cousin. Acceptance and commitment therapy (ACT) teaches people to make room for difficult thoughts and feelings while acting on their values. A 2015 meta-analysis of 39 randomised trials found ACT worked better than waitlist, placebo and usual care for a range of mental and physical health problems, and about as well as established CBT. ACT is not Stoicism, but it shares the same practical shape.

What the dichotomy is not

It is easy to hear “focus only on what you control” as “give up” or “don’t care”. Epictetus meant neither.

It is not passivity. Your effort, preparation and choices are firmly on the “up to you” side. The dichotomy asks you to put more energy into them, not less.

It is not indifference to other people. Marcus Aurelius, who lived by these ideas, wrote often about duty and about being made for cooperation with others. What is outside your control is how others respond, not whether you treat them well.

It is not a reason to put up with harm. If you are in an unsafe situation, leaving, asking for help or setting a boundary are all choices within your power.

Using it on a real worry

Most real problems are not neatly in one column. They are mixed. Here is a simple way to split them.

1. Name the worry in one sentence. “I’m afraid the presentation on Thursday will go badly.”
2. List what is up to you. Preparing the slides, practising twice out loud, getting a decent night’s sleep, how you respond to a tough question.
3. List what is not. Who attends, what mood they are in, what they decide afterwards.
4. Turn the first list into one next step. “Practise the opening tonight, out loud, once.”
5. Release the second list, gently. When your mind drifts back to it, say: “That part isn’t mine.” Then return to the step.

Epictetus also gave a sentence you can use for step five. “Demand not that events should happen as you wish; but wish them to happen as they do happen, and you will go on well” (Enchiridion 8). That is a high bar, and you do not need to clear it on day one. Even loosening your grip a little tends to free up attention.

If worry has become constant, is hard to switch off, or is affecting your sleep or daily life, the dichotomy of control is not a substitute for support. Our guide to understanding anxiety explains what helps and when to talk to a GP or therapist.

A small, wise move

The dichotomy of control works best as a habit rather than an insight. You will not stop worrying because you read a good sentence. But if, each time a worry comes back, you ask “which part of this is mine?”, the question slowly becomes automatic. That is how Epictetus intended it: as daily practice, one worry at a time. If you would like more practices in the same spirit, see Stoicism for everyday life.