The Therapy That Worked Already: How Albert Ellis Built CBT from Epictetus
How Albert Ellis built CBT from a philosopher who died in 135 CE
Cognitive behavioural therapy is the most rigorously tested psychological treatment in existence. Meta-analysis after meta-analysis confirms it: for depression, anxiety, OCD, PTSD, phobias, it outperforms or matches every alternative. It is what the evidence points to. If you have ever been in therapy, there is a reasonable chance CBT is what you did.
What almost nobody knows is that Albert Ellis — the man who built the first version of it, in 1955 — read Epictetus first.
Not as a curiosity. Not as a vague cultural influence. Ellis said explicitly, in his own writing, that the Stoic philosophers were among the direct sources for what became Rational Emotive Behaviour Therapy, the model that preceded and shaped CBT. He cited Epictetus by name. He cited Marcus Aurelius. He pointed to a sentence written in the second century CE and said: this is the idea.
The sentence was: "Men are disturbed not by the things which happen, but by the opinions about the things."
That is the founding insight of cognitive therapy. Epictetus wrote it roughly 1,800 years before Ellis put it into clinical practice.
What Is the Connection Between CBT and Stoic Philosophy?
The connection is not that CBT and Stoicism happen to sound similar. Plenty of ideas sound similar across history without one causing the other. The connection is that Ellis read the Stoics before he built his model, found the core mechanism already articulated there, and said so.
This matters because it changes what you are looking at when you look at CBT. You are not looking at a 1950s American invention. You are looking at an ancient Greek and Roman discovery that was rediscovered, formalised, and then tested in randomised controlled trials. The trials confirmed what Epictetus argued from logic alone.
What both systems claim is this: the distress does not come from the event. It comes from the interpretation of the event. A rejection is painful not because rejection is inherently catastrophic but because the mind classifies it as catastrophic. A critical comment from a colleague causes suffering not because criticism is objectively damaging but because the thought that follows it — I am incompetent, I will be found out, this proves something terrible about me — is the actual source of the pain.
The event is the trigger. The interpretation is the cause.
If that is true — and both Epictetus and the clinical evidence say it is — then the intervention is not to change the events of your life. It is to examine the interpretations.
How Albert Ellis Built REBT from Epictetus
Ellis developed Rational Emotive Behaviour Therapy in the mid-1950s, after spending years as a practising psychoanalyst and becoming dissatisfied with what psychoanalysis actually produced. Patients understood their childhood. They could trace the origin of their patterns. They did not change.
His working theory was that the problem was not the history — it was the belief. Specifically, the irrational belief that a person was holding in the present, right now, about what an event meant. The historical excavation of psychoanalysis was beside the point if the patient left every session still holding the same evaluative claim about themselves and the world.
Ellis began building a model based on what he called the ABC framework. A is the Activating event. B is the Belief about the event. C is the emotional and behavioural Consequence. The target of therapy was B — not what happened, but what the person had decided it meant.
When he looked for intellectual ancestors, he found the Stoics. He named Epictetus, Marcus Aurelius, and Seneca in his early writing as sources. The framework was not a borrowing — he had arrived at the ABC model through clinical observation. But when he looked at Epictetus, he found the same structure, stated with more concision than he had managed himself.
Men are disturbed not by the things which happen, but by the opinions about the things.
That is the ABC model in one sentence. A (things which happen), B (opinions about things), C (disturbance). Ellis acknowledged it. He was not embarrassed by it. He was, by most accounts, delighted.
What Epictetus Said That Became the Founding Idea of CBT
Epictetus wrote this in the Discourses, compiled by his student Arrian around 108 CE. He was not writing theory. He was giving practical instruction to students who had come to him to learn how to live.
The instruction was specific. When you are distressed, do not ask what happened. Ask what you decided it meant. The suffering is located in the verdict, not the event.
He went further. The Enchiridion — a short handbook of his core teachings — gives the procedural version. When something disturbs you:
Try, therefore, in the first place, not to be bewildered by appearances. For if you once gain time and respite, you will more easily command yourself.
Pause before the verdict. Create a gap between the appearance — the immediate impression that something terrible has happened — and the judgement about what it means. In that gap, examine it.
This is not a metaphor for what CBT does. It is a description of what CBT does, written nineteen centuries before CBT existed.
The formal CBT equivalent is called cognitive restructuring. The therapist asks the patient to identify the automatic thought — the immediate, involuntary interpretation — and then to examine it against the evidence. Is this thought accurate? Is it the only possible interpretation? What would a less distressed version of you conclude?
Epictetus called the automatic thought an appearance (phantasia). He called the examination prohairesis — the faculty of choice and judgement, the only thing fully within our control. The structure is identical. The vocabulary is different.
What this means practically: every time a CBT therapist asks "what thought was running when you felt that?" they are asking the question Epictetus was asking in a lecture hall in Nicopolis around 100 CE.
How REBT Became CBT — and Why the Stoic Core Survived
Ellis's REBT was not the only cognitive model in the field. Aaron Beck, working independently in the 1960s, developed his own cognitive therapy from a different direction — originally from his work with depressed patients, noticing that they all seemed to maintain a running internal commentary that distorted events in a consistently negative direction. Beck called these cognitive distortions.
Beck's clinical work and Ellis's philosophical-therapeutic work converged on the same architecture. Both placed the interpretation — the automatic thought, the belief — at the centre of the treatment. Both used the same basic intervention: notice it, examine it, test it against reality.
CBT as it is practised today draws from both lineages. The Stoic core survived because it was not, in the end, a historical curiosity that Ellis happened to like. It was right. Independent clinical observation, with no knowledge of Epictetus, produced the same model. That is not coincidence. That is what happens when you identify a real mechanism.
The mechanism: human suffering is primarily generated not by circumstances but by evaluative beliefs about circumstances. Change the belief and you change the suffering. The circumstances may not change. The suffering can.
This is either the most important psychological discovery of the ancient world or the most important psychological discovery of the twentieth century, depending on when you think the discovery happened. Ellis's position, for what it's worth, was that the discovery happened in Greece.
What the Ellis–Epictetus Connection Means for How You Think About Therapy Today
Here is the practical implication, and it is a significant one.
If CBT works — and the evidence says it does — then what CBT is doing is implementing a Stoic practice. The tools, the homework, the thought records, the cognitive restructuring exercises: these are the modern, formalised, clinically tested version of what Epictetus was teaching his students to do by hand, in real time, without a worksheet.
This does not make CBT less impressive. If anything, it makes Stoicism more impressive — it means the ancient practice is not wisdom-literature comfort food but a model of how the mind actually works that survived clinical testing two thousand years later.
What it opens up is a question about where you want to apply the insight. Formal CBT is a clinical tool, deployed in a therapeutic relationship with a trained practitioner. Epictetus's version is a personal practice — something you do alone, daily, as a discipline of attention.
The Stoics called this prosochē: attention to oneself. The ongoing practice of noticing when an appearance has arrived, pausing before the verdict, and examining whether the interpretation is accurate. Not once, in a therapeutic intervention. Continuously, as a way of inhabiting a life.
That is what Marcus Aurelius was doing in Meditations — writing the practice down, every evening, for decades. Not because he had mastered it. Because the practice requires repetition to produce the thing it promises.
The Evening Review is built on the same structure: three questions, five minutes, end of day. What happened. What I made it mean. What I would examine more honestly. It is not therapy. It is the practice that therapy formalised.
If you want to start somewhere concrete, that is the place.
Ellis drew on Epictetus, but Epictetus did not appear from nowhere. For the philosopher himself — his life, his method, and why he became the founding insight of psychotherapy — see Epictetus: the philosopher who gave psychotherapy its founding insight. And for the Stoic practice that Marcus Aurelius carried into daily life, He was writing to himself shows what the discipline looked like in action.
