Epictetus, who was enslaved for much of his early life, made the following observation that became the opening of his handbook on Stoic practice: "Some things are in our control and others not." It is perhaps the most practically consequential sentence in ancient philosophy.
What we control, he said, are our judgments, desires, aversions, and actions — what he called prohairesis, the faculty of choice. What we do not control are our bodies, our reputations, our possessions, and the outcomes of our actions.
The Stoic practice begins from this distinction.
The Dichotomy of Control
The dichotomy Epictetus articulates is not about passivity. It is about where you direct your energy and what you make contingent for your well-being.
If you attach your happiness to outcomes you cannot fully control — other people's opinions, your health, your financial security, your children's choices — you have made your inner life hostage to the external world. The world will betray you. Things beyond your control will go wrong. Your happiness, if tied to those things, will go wrong too.
If you attach your happiness to what you actually control — how you respond, what you choose, the quality of your attention and effort, your values — you have built on ground that cannot be taken from you. Even in chains, Epictetus maintained, you are free in the only way that matters.
What makes you angry, anxious, or miserable is not what happens to you. It is your judgment about what happens to you. And judgment is yours.
The Roman Practitioners
Stoicism was not only a philosophy of the enslaved. Marcus Aurelius, Emperor of Rome, filled private notebooks with Stoic exercises — not to publish, but to practice. The Meditations reveal a man who was responsible for an empire and felt, repeatedly, the pull of irritation, exhaustion, and the desire for recognition — and who returned, again and again, to the basic Stoic disciplines.
"You have power over your mind, not outside events. Realize this, and you will find strength." He wrote this not as a maxim for posterity but as a reminder to himself.
Seneca, a statesman of enormous wealth and political power, wrote extensively about the shortness of life and the waste of time spent pursuing externals. His letters to Lucilius constitute one of the most sustained practical explorations of Stoic ethics in the ancient world.
The Three Disciplines
John Sellars and other contemporary scholars have organized Stoic practice into three disciplines, based on Epictetus's discussions.
The discipline of desire: wanting only what is genuinely good and within your control, ceasing to pursue externals as though they were necessary for happiness. This does not mean not preferring health to sickness or prosperity to poverty. It means not being enslaved to those preferences.
The discipline of action: acting with full commitment to the action and the intention, while accepting in advance that the outcome may not be what you worked for. Stoics spoke of acting "with reservation" — giving your full effort while holding the result lightly.
The discipline of assent: carefully examining the impressions that arise — the automatic interpretations and judgments — before giving them your assent. When something seems terrible or insulting or unjust, the Stoic practice is to pause and ask: is this impression accurate? Is this the kind of thing I have control over?
What Modern Stoicism Gets Right and What It Misses
There has been a significant revival of Stoic ideas in contemporary self-help, psychology (especially CBT, which shares structural similarities with Stoic practice), and performance culture. Much of it is valuable.
What sometimes gets lost is the communal and political dimension of Stoicism. The ancient Stoics believed in universal human reason — that every person shares in the same rational nature, and therefore every person is worthy of moral consideration. Marcus Aurelius wrote about the "common city" of rational beings. Stoicism was, among other things, a cosmopolitan ethics.
Reducing it to a personal productivity tool or stress management technique strips out this dimension. Stoicism is not about becoming indifferent to others; it is about becoming unshakeable in service to them.
¹ Marcus Aurelius — Meditations (trans. Gregory Hays, 2002, Modern Library) ² Epictetus — Discourses and Selected Writings (trans. Robert Dobbin, 2008, Penguin Classics) ³ Ryan Holiday — The Obstacle Is the Way (2014, Portfolio/Penguin)
