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Epictetus: The Slave Philosopher Who Taught Inner Freedom

Updated: April 2026
Last Updated: March 2026, Reviewed for accuracy, Stoic scholarship, and Steiner connections; FAQ expanded.

Quick Answer

Epictetus (c. 50-135 AD) was a Greek Stoic philosopher who taught that the only true freedom lies in mastering what is within your power, specifically your judgements, desires, and responses, while accepting everything outside your control with equanimity. Born into slavery, his teachings survive through the Enchiridion and Discourses, compiled by his student Arrian.

Key Takeaways

  • Dichotomy of control: Epictetus divided all things into what is "up to us" (judgements, desires, impulses) and "not up to us" (body, reputation, circumstances). Freedom comes from working only within the first category.
  • Born into slavery: Epictetus was enslaved in Rome before being freed around 68 AD. His biography gives his philosophy of inner freedom particular weight. He taught that no master can own the ruling faculty of a person who does not consent to be owned inwardly.
  • Three disciplines: Epictetus organized Stoic practice into desire (orexis), action (hormê), and assent (synkatathesis). Together these train appetite, will, and reason into a unified philosophical life.
  • No writings survived: Epictetus wrote nothing himself. His student Arrian compiled the Discourses (four of eight books survive) and the condensed Enchiridion around 125 AD.
  • Rudolf Steiner connection: In GA 18 (The Riddles of Philosophy, 1914), Steiner recognized the Stoics as the first thinkers to turn philosophy decisively inward, identifying the thinking subject as something irreducible to external circumstance, an early precursor to his own philosophy of inner development.

🕑 14 min read

The Slave Who Became Philosophy's Greatest Teacher

Around 50 AD, in Hierapolis, Phrygia (modern Pamukkale in western Turkey), a child was born into slavery. We do not know his birth name. The name Epictetus, by which history remembers him, simply means "acquired" in Greek, a common name given to enslaved people as property. He would go on to produce one of the most psychologically precise philosophies ever articulated, and he would do so precisely because of what his circumstances taught him about the limits of outer control.

Brought to Rome, Epictetus became the property of Epaphroditus, an administrative secretary and freedman under Emperor Nero. The detail that matters is this: Epaphroditus permitted his slave to study with Musonius Rufus, one of the most rigorous Stoic teachers of the first century. This access to philosophical education would prove more consequential than any other fact in Epictetus's life.

The Broken Leg and the Ruling Principle

Later biographies record an incident, possibly historical, possibly exemplary, in which Epaphroditus twisted Epictetus's leg to test his composure. Epictetus reportedly said, calmly, "You will break it." When the leg broke, he added, "Did I not tell you?" The story is almost certainly shaped by later tradition to illustrate his teachings. But it captures something real about the man: for Epictetus, the leg was not up to him. The response was. This distinction was not a coping mechanism. It was the whole of philosophy.

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After Nero's death and the upheaval that followed, Epictetus was freed, sometime around 68 AD. He continued teaching in Rome until the Emperor Domitian banished all philosophers from the city around 93 AD. Epictetus moved to Nicopolis, in what is now northwestern Greece, and opened a school. Students came from across the Roman world to attend his lectures. He lived simply, reportedly owning little more than a lamp, a sleeping mat, and a clay lamp-stand that thieves once stole. He seems to have regarded the theft with philosophical amusement.

He died around 135 AD. He left no writings. Everything we have comes through his student Arrian.

The Dichotomy of Control: Eph' Hemon

The first sentence of the Enchiridion is the single most important sentence in Stoic literature: "Some things are in our power, and others are not." This is the whole of Epictetus condensed to thirteen words.

In Greek, the technical phrase is eph' hemon (what is up to us) and ouk eph' hemon (what is not up to us). The division is not about what we can influence to varying degrees. It is binary and absolute. Either something belongs entirely to our inner life, or it does not belong to us at all.

What Is and Is Not Up to Us

Epictetus is precise. Up to us: our judgements, desires, aversions, impulses, and the assent we give or withhold to impressions. Not up to us: our bodies, reputation, wealth, positions, other people's opinions and actions, the outcomes of our efforts, illness, death, and all external circumstances. The categories are cleaner than modern psychology typically acknowledges. Epictetus is not saying we have no influence over external things. He is saying they are not truly ours, and that treating them as ours is the source of virtually all human suffering.

The practical implication is striking. Most of what causes human unhappiness, anxiety about what others think, resentment when plans fail, fear of illness or poverty, grief over circumstances beyond our control, comes from treating things that are not up to us as if they were. Conversely, most neglect of what is genuinely within our power (our judgements, our response to events, our inner character) comes from investing those energies outward instead.

This is not passivity. Epictetus was emphatic that the things that are up to us require intense, continuous effort. "You are not yet a Socrates," he told students. "But you ought to live as one who wishes to be a Socrates." The inner work is the real work. Everything else is secondary.

Some critics argue the dichotomy is too clean: surely our bodies are partly up to us through diet and exercise, surely reputation is shaped in part by our choices? Epictetus would agree that we have influence over these things. But the outcomes are never fully within our control. You can eat well and still fall ill. You can act with integrity and still be misunderstood. The distinction is between what is entirely within the domain of your will and what is only partially, contingently, or never under its authority.

The Enchiridion: A Handbook for Inner Freedom

The Enchiridion (from the Greek for "that which is held in the hand") was compiled by Arrian around 125 AD as a condensed practical guide drawn from the fuller Discourses. It is 53 chapters, most of them short. It was designed to be carried, consulted, and applied daily. Think of it as a spiritual practice manual rather than a theoretical text.

Chapter Core Teaching Practical Application
1 The fundamental division: what is and is not up to us Before reacting to any situation, ask: is this up to me?
5 It is not things that disturb us but our judgements about things When upset, identify the judgement that caused the upset, not the event
8 Do not seek to have events happen as you wish; wish them to happen as they do Reframe frustration as a mismatch of expectation, not a wrong done to you
17 Remember you are an actor in a play. Your role is assigned; play it well Accept the circumstances of your life without resentment; fulfil your role with excellence
20 You can be invincible if you enter no contest where the victory is not up to you Stop competing in arenas where outcome depends on others' choices
33 Maintain a daily discipline of speech, action, and desire Track the three disciplines each evening in a brief written review
51 The first and most necessary topic in philosophy is the practical application of principles Theory without practice is nothing; begin with the smallest daily action

The Enchiridion was adopted by Christian monastics in late antiquity, with some versions substituting "God" for "Zeus" and "Christ" for "Socrates." This reveals how close Epictetus's ethics of inner discipline came to early Christian asceticism. Benedict of Nursia's Rule of the sixth century shares structural parallels with Epictetan practice: the scheduled examination of conscience, the subordination of bodily impulse to will, the cultivation of equanimity under hardship.

The Discourses: Epictetus in His Own Voice

The Discourses are a fuller record of Epictetus's actual teaching. Arrian compiled eight books; four survive. They are written in a direct, sometimes combative spoken style. Epictetus addresses students by name, interrupts his own arguments, shifts register mid-sentence. These are not polished philosophical essays. They are lectures and dialogues preserved as closely to live speech as ancient literary practice allowed.

Several features distinguish the Discourses from the Enchiridion. They are more psychologically specific. Epictetus diagnoses student errors in real time: this student is too ambitious, that one avoids discomfort, another pretends to philosophical progress while remaining unchanged. The Discourses also contain more of Epictetus's theological framework. He speaks often of God (Zeus) as the rational principle ordering the cosmos, and of each human being as a fragment of the divine rational fire. Our hegemonikon (ruling faculty) is a portion of divinity placed within us. To neglect it, or to corrupt it through false judgements and disordered desires, is an act of impiety as much as an act of self-harm.

The Hegemonikon: The Divine Spark Within

Epictetus uses the term hegemonikon (ruling principle) to name the innermost faculty of the human being: the part that judges, desires, assents, and wills. This is not the body, not the emotions as mere biological phenomena, not social role or reputation. It is the irreducible seat of rational agency. Epictetus describes it as a fragment of Zeus placed within each person. No master, tyrant, or circumstance can reach it unless the person consents to its corruption. This teaching places Epictetus in a lineage that runs through Neoplatonism, Christian mysticism, and into Steiner's description of the "I" as the innermost kernel of the human being, the aspect that no external power can touch without inner consent.

Discourses Book I, Chapter 1 opens with the most sustained argument for the dichotomy of control anywhere in ancient literature. Book II addresses the specific pitfalls of students who understand the philosophy intellectually but have not yet applied it to their own habits. Book III contains some of the most demanding material: Epictetus's expectations for those serious about the philosophical life are high, and he does not soften them. Book IV addresses freedom, friendship, and the management of external relationships from a position of inner stability.

The Three Disciplines of Stoic Practice

The scholar Pierre Hadot, in his influential study of ancient philosophy as a way of life, identified three distinct disciplines in Epictetus's teaching that together constitute a complete Stoic practice. These are not three sequential stages but three simultaneous streams of work.

Discipline 1: Desire (Orexis)

Train your desires and aversions so that you only want what is genuinely within your power, and avoid only what is genuinely up to you to avoid. The common error is desiring things not up to you (wealth, status, others' approval) and fearing things not up to you (poverty, illness, death). Epictetan training gradually reverses this: desire virtue and wisdom; fear only your own moral failure. Everything else becomes what the Stoics call "preferred indifferents": things that may or may not happen, and whose absence does not diminish your real good.

Discipline 2: Action (Hormê)

Act consistently for the benefit of the rational whole, not merely for personal gain, but accept that outcomes are not up to you. Epictetus uses the phrase "with reservation" (hupexhairesis): act fully and commit completely, while holding the outcome lightly. A physician acts with full commitment to heal the patient, but the patient's recovery is not entirely up to the physician. Act as if the outcome matters completely; hold it as if it does not matter at all. This is not indifference but philosophical two-handedness.

Discipline 3: Assent (Synkatathesis)

Scrutinize every impression before granting it your assent. An impression arrives automatically: "I have been insulted," "I am in danger," "This person is my enemy." The discipline of assent teaches you to pause at the threshold and ask whether the impression is accurate. Most are not, or are only partially true. The anger that follows "I have been insulted" depends entirely on the judgement that what happened constitutes an insult, that insults matter, and that this particular person's opinion has authority over your inner state. Each of these is a separate assent, each examinable.

Pierre Hadot's reading of these three disciplines has influenced how contemporary scholars understand Stoicism. It also reveals why Stoic philosophy is a practice, not a doctrine. You cannot read your way to Stoic equanimity. The disciplines require daily application, repeated failure, renewed effort, and gradually built capacity.

Musonius to Marcus: The Stoic Chain of Transmission

Epictetus sits at the centre of the most consequential chain in Roman Stoicism. Understanding this lineage clarifies what is distinctive in his contribution.

Philosopher Dates Contribution Relation to Epictetus
Zeno of Citium c. 334-262 BC Founded Stoa Poikile school in Athens; identified virtue as the only good Founder of Stoicism, 4 centuries before Epictetus
Chrysippus c. 279-206 BC Systematized Stoic logic, physics, and ethics; "Without Chrysippus, there would be no Stoa" Principal architect of Stoic theory Epictetus inherited
Musonius Rufus c. 30-100 AD Pioneered Stoicism as daily practice over theory; emphasized gender equality in philosophy Direct teacher; Epictetus studied under him in Rome
Epictetus c. 50-135 AD Distilled Stoicism into practical disciplines; gave it a theological depth centred on the hegemonikon The figure itself
Arrian of Nicomedia c. 86-160 AD Student who preserved Epictetus's lectures in Discourses and Enchiridion Primary student and recorder
Marcus Aurelius 121-180 AD Applied Stoic discipline under conditions of imperial power and war; Meditations as personal practice journal Never met Epictetus but studied Discourses; cites him multiple times in Meditations

What passes down this chain is not primarily doctrine but a practice orientation. Musonius insisted that philosophy must change daily behaviour, not just beliefs. Epictetus intensified this: the goal of philosophical study is not to have the right opinions but to apply them at the moment of provocation, at 3am when you cannot sleep, at the moment your plans collapse. Marcus applied this under conditions that tested it completely: military campaigns, plague, the death of children, the corruption of advisors. The chain from Musonius to Marcus is the most tested transmission of practical philosophy in Western history.

Rudolf Steiner and the Stoic Inward Turn

Rudolf Steiner addressed the Stoics in several contexts, most systematically in The Riddles of Philosophy (GA 18, 1914). His assessment is neither dismissive nor uncritical. He identifies the Stoic movement as representing a significant transition in the history of human consciousness.

Before the Stoics, Steiner argues, Greek philosophy was primarily directed outward: toward the cosmos, the forms, the rational structure of the world. With the Stoics, and particularly with their emphasis on the inner life of the individual philosopher, something new appeared. Philosophy became concerned with the relationship between the thinking subject and the world, with how the inner life of a person relates to external reality. This inward turn, Steiner argues, was a necessary development in the evolution of consciousness.

The Stoic Soul as Precursor to Steiner's "I"

In GA 9 (Theosophy, 1904), Steiner describes the human being as composed of physical body, etheric body, astral body, and the "I" (Ich). The "I" is the innermost kernel of individual identity, the aspect that in principle cannot be reached or owned by any external power. It is the ground of true freedom. This bears a structural resemblance to Epictetus's hegemonikon: the ruling faculty that belongs entirely to itself and cannot be coerced from without. Steiner would not have identified these as identical, but he would have recognized in Epictetus an early, pre-spiritual-scientific attempt to name something real about the irreducible inner human being. In our reading, Stoic practice at its most intensive is preliminary work on what Steiner calls the sentient soul, training the aspect of the soul that interfaces with impulse and desire to act from considered inner sovereignty rather than reactive appetite.

Steiner also addressed the Stoic logos doctrine. For the Stoics, the logos is the rational principle that orders the cosmos and of which the human hegemonikon is a fragment. Steiner's own Christology centres on the Logos, the same Greek word, now understood not as an abstract cosmic principle but as a being: the Christ being who entered earthly existence at the Baptism in the Jordan. For Steiner, this is not a contradiction of the Stoic insight but its fulfilment. The impersonal rational fire of Stoic cosmology became, in the Mystery of Golgotha, a personal spiritual reality capable of entering into direct relationship with individual human beings.

The Stoic practice of daily philosophical review (the evening examination of conscience that Epictetus recommends in Discourses III.10) also parallels practices Steiner recommended for spiritual development. In How to Know Higher Worlds (GA 10, 1904), Steiner suggests reviewing the events of the day in reverse order each evening, observing them without attachment as a discipline for developing objectivity toward one's own inner life. Both practices ask the practitioner to step back from the automatic flow of experience and observe it with a cooler, more sovereign inner gaze.

How to Apply the Epictetan Discipline of Assent Daily

The discipline of assent (synkatathesis) is the most immediately applicable of the three Stoic disciplines for people who encounter Epictetus through modern contexts. It does not require extensive philosophical background. It requires only the habit of pausing.

Step 1: Morning Intention

On waking, before checking any device, read one paragraph of the Enchiridion. Identify one situation today where you expect to be tested: a difficult conversation, a frustrating task, a person whose behaviour typically provokes a reaction. Name specifically what is and is not up to you in that situation. Write this down in two sentences.

Step 2: The Pause Practice

When a strong reaction arises during the day, stop before acting on it. Say internally: "This is an impression. It is not the thing itself." Wait five seconds before responding. This is synkatathesis in action: the gap between stimulus and response is where the Stoic work happens. The five-second pause is not a suppression of feeling but an interposition of the ruling faculty between the impression and the automatic response.

Step 3: Evening Review (Tripartite)

Review the day through the three disciplines. Where did desire or aversion pull you toward things not up to you? (Discipline of desire.) Where did action serve only your own interest rather than the wider good, or where did you over-invest in outcomes you could not control? (Discipline of action.) Where did you accept an impression without scrutiny, reacting automatically to something that, examined, would not have warranted that reaction? (Discipline of assent.) Three questions, honest answers, no self-condemnation.

Step 4: The Formulation

Close the evening by writing one sentence: what was genuinely up to you today, and what did you do with it? This grounds the practice in the concrete and prevents the philosophy from becoming abstract self-congratulation. Epictetus was not interested in students who could recite the principles. He was interested in students who had changed. The sentence is evidence one way or the other.

On Cognitive-Behavioural Therapy and Epictetus

Albert Ellis, who developed Rational Emotive Behaviour Therapy (REBT) in 1955, explicitly credited Epictetus as the intellectual forefather of his approach. The ABC model (Activating event, Belief about the event, Consequent emotion) is a direct translation of Epictetus's Enchiridion Chapter 5: "It is not events that disturb people, but their judgements about events." Aaron Beck's Cognitive Therapy, developed independently through the 1960s, converged on the same principle. This is not coincidence. It is a convergent discovery of something structurally true about how human distress is produced and how it can be reduced.

Frequently Asked Questions

Recommended Reading

Slave and Sage: Remarks on the Stoic Handbook of Epictetus by Ferraiolo, William

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What is Epictetus best known for?

Epictetus is best known for the dichotomy of control: the Stoic teaching that some things are "up to us" (our judgements, desires, and actions) and some things are not (our body, reputation, wealth, others' opinions). He taught that true freedom lies in mastering what is within our power while accepting everything outside it with equanimity. His teachings survive through the Enchiridion and Discourses, both compiled by his student Arrian around 125 AD.

Was Epictetus actually a slave?

Yes. Epictetus was born into slavery around 50 AD in Hierapolis, Phrygia (modern Turkey). He was owned by Epaphroditus, a freedman of Emperor Nero. His master permitted him to study with the Stoic teacher Musonius Rufus. Later accounts describe his master deliberately breaking his leg to test his composure, and Epictetus responding without anger. He was eventually freed around 68 AD, continued teaching in Rome, then moved to Nicopolis after Domitian's expulsion of philosophers in 93 AD. He lived simply and died around 135 AD.

What is the Enchiridion by Epictetus?

The Enchiridion (Greek for "that which is held in the hand") is a short practical guide compiled by Arrian around 125 AD, condensing Epictetus's Discourses into 53 chapters designed for daily use. It opens with the central Stoic principle: "Some things are in our power, and others not." The Enchiridion was widely read in antiquity, adopted by Christian monastics in late antiquity, and remains one of the most accessible introductions to Stoic philosophy available today.

What are the three disciplines of Epictetus?

Epictetus organized Stoic practice into three simultaneous disciplines. The discipline of desire (orexis): training appetite to want only what is genuinely up to you. The discipline of action (hormê): acting for the common good while holding outcomes lightly. The discipline of assent (synkatathesis): pausing before accepting impressions automatically and scrutinizing them first. The scholar Pierre Hadot's study of ancient philosophy as a spiritual exercise identified these as the core structure of Epictetan practice in his 1981 work Exercices spirituels et philosophie antique.

How did Epictetus influence Marcus Aurelius?

Marcus Aurelius never met Epictetus (who died around 135 AD, before Marcus's philosophical maturity) but studied the Discourses deeply. In the Meditations, Marcus cites Epictetus multiple times and echoes his framework throughout. Both men faced circumstances that tested their philosophy at extremes: Epictetus as a slave, Marcus as a wartime emperor managing plague, military campaigns, and the deaths of most of his children. The lineage from Musonius Rufus to Epictetus to Marcus Aurelius represents the most tested transmission of practical Stoic philosophy in history.

Did Epictetus write any books himself?

No. Epictetus left no writings of his own. Like Socrates, he taught entirely through spoken dialogue. His student Arrian attended his lectures and produced eight books of Discourses (four survive) and the condensed Enchiridion around 125 AD. Arrian's preface states he aimed to capture Epictetus's exact words as faithfully as possible, making the surviving texts as close to primary source material as we have, though filtered through one student's memory and choices.

What is the meaning of eph hemon in Epictetus?

Eph' hemon (Greek: "within our power" or "up to us") is the central technical term in Epictetus's philosophy. It refers to everything belonging entirely to inner life: judgements, desires, aversions, impulses, and the assent given to impressions. Everything else, including body, reputation, relationships, and outcomes, is ouk eph' hemon (not up to us). The entire Enchiridion flows from this distinction. Most human unhappiness, Epictetus argues, comes from treating things not up to us as if they were, and neglecting the development of what genuinely is.

How does Epictetus connect to spiritual development?

Epictetus taught that the hegemonikon (ruling faculty) is a fragment of divine rational fire within each person, and that its cultivation is the whole purpose of philosophical life. Rudolf Steiner, in The Riddles of Philosophy (GA 18, 1914), identified the Stoics as pioneering the inward turn in Western philosophy, the shift from outward cosmological inquiry to the relationship between the thinking subject and the world. This inward turn parallels the first stages of inner development Steiner describes in How to Know Higher Worlds (GA 10): learning to observe one's own inner life with detachment and precision before reaching for higher spiritual faculties.

Is Stoicism compatible with spiritual or religious practice?

Many practitioners find Stoicism and spiritual practice deeply compatible. Epictetus spoke of God (Zeus) as the rational author of the cosmos and of each person as a portion of divinity. Early Christian writers, including Clement of Alexandria and Origen, drew heavily on Stoic ethics. Benedict of Nursia's monastic Rule shares structural parallels with Epictetan discipline. From a Steinerian perspective, Stoic cultivation of the ruling principle can be understood as preliminary work on the sentient soul, the first stage of inner development that precedes the higher faculties of intellectual soul and consciousness soul.

What is Epictetus's view on death?

Death is the clearest example, for Epictetus, of something not up to us. It is therefore not to be feared. Fear of death, he argues, comes from the false belief that our existence depends on the continuation of the body, when in fact everything of genuine value in a person, the quality of judgement, the integrity of character, the freedom of the inner life, does not depend on the body's survival. The Enchiridion Chapter 21 puts it plainly: "Let death and exile and all things that appear terrible be daily before your eyes, but death chiefly; and you will never entertain any abject thought, nor too eagerly covet anything."

How does Epictetus's philosophy connect to spiritual development?

Epictetus taught that the inner faculty of judgement (the hegemonikon, or ruling principle) is the only truly free part of a human being. Developing this faculty through daily philosophical practice is, in his view, the whole purpose of life. Rudolf Steiner, in his 1914 work The Riddles of Philosophy (GA 18), recognized the Stoics as pioneering thinkers who first turned philosophy inward, identifying the thinking subject as something distinct from the external world. This inward turn, from outer circumstances to inner life, parallels the spiritual development process Steiner describes in works like How to Know Higher Worlds.

What is the meaning of 'eph hemon' in Epictetus?

Eph' hemon (Greek: within our power, or 'up to us') is the central technical term in Epictetus's philosophy. It refers to everything that belongs entirely to our inner life: our judgements, desires, aversions, impulses, and the assent we give to impressions. Everything else, including our bodies, reputation, relationships, and wealth, is 'not up to us' (ouk eph' hemon). The entire Enchiridion flows from this single distinction. Epictetus argued that most human unhappiness comes from treating things that are not up to us as if they were, and from neglecting the things that genuinely are.

What is the most important lesson from Epictetus for modern life?

The most consistently useful lesson is the pause before reaction: training yourself to stop between stimulus and response and ask, 'Is this up to me or not?' If it is not up to you, Epictetus says, practice saying 'it is nothing to me.' This sounds cold but is in practice liberating. Most anxiety, resentment, and frustration attach to things we cannot control. The Stoic practice of identifying what is genuinely within our power, and then acting on that with full commitment, reduces mental suffering significantly. Cognitive-behavioural therapy has its conceptual roots in exactly this framework.

The Freedom That No One Can Take

Epictetus began life as property and ended it teaching emperors' students that the only real ownership is of your own inner life. The conditions of his life were not ideals: slavery is not a spiritual path, and Epictetus did not romanticize it. What he found within those conditions was a principle that holds regardless of circumstance: the ruling faculty within you belongs to you alone, and no external power can corrupt it without your consent. That principle is as available to you today as it was to students who crossed the Roman world to sit in his school at Nicopolis. The work begins with one question: what, right now, is genuinely up to you?

Sources & References

  • Epictetus. (c. 125 AD). Enchiridion. Compiled by Arrian of Nicomedia. Trans. Robin Hard. Oxford University Press, 2014.
  • Epictetus. (c. 108 AD). Discourses, Books I-IV. Compiled by Arrian of Nicomedia. Trans. Robin Hard. Oxford University Press, 2014.
  • Long, A. A. (2002). Epictetus: A Stoic and Socratic Guide to Life. Oxford University Press.
  • Hadot, P. (1995). Philosophy as a Way of Life: Spiritual Exercises from Socrates to Foucault. Blackwell. (French original 1981.)
  • Steiner, R. (1914). The Riddles of Philosophy (GA 18). Rudolf Steiner Press, 2009.
  • Steiner, R. (1904). Theosophy: An Introduction to the Spiritual Processes in Human Life and in the Cosmos (GA 9). Anthroposophic Press, 1994.
  • Marcus Aurelius. (c. 170-180 AD). Meditations. Trans. Gregory Hays. Modern Library, 2002.
  • Ellis, A. (1962). Reason and Emotion in Psychotherapy. Lyle Stuart. (Credits Epictetus as conceptual precursor to REBT.)
  • Sellars, J. (2006). Stoicism. University of California Press.
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