There is a letter from Seneca to Lucilius — Letter 18, written near the end of his life — in which he describes what he does every month. He sets aside a few days. He sleeps on a simple pallet. He eats the food of the poor: coarse bread, water, whatever requires no preparation. He wears rough clothing. And he asks himself, as he lives this way: “Is this the condition I feared?”
The answer, he reports, is always the same: no. It is not. The things he had been quietly dreading — the loss of comfort, the reduction of circumstances, the hard bed — turn out, when actually tried, to be bearable. More than bearable: clarifying. The fear was larger than the reality, as fears almost always are. And the act of choosing the discomfort, freely and in advance, has stripped the fear of its power.
This is the practice the Stoics called askesis — the deliberate training of the self through voluntary hardship. It is the most underrated tool in the whole Stoic tradition, and possibly the most powerful. This guide explains what it is, why the Stoics used it, and how to adapt it for a modern life.
What voluntary discomfort is (and what it is not)
Voluntary discomfort is the deliberate, chosen exposure to conditions that are harder than your normal baseline — cold, hunger, physical exertion, reduced comfort — not because you have to endure them, but because you have decided to.
It is not self-punishment. Seneca is emphatic on this. The point is not to suffer. The point is to rehearse — to try the feared thing in controlled conditions before circumstances impose it on you. “Set aside a number of days,” he writes, “during which you shall be content with the scantiest and cheapest fare, with coarse and rough dress, saying to yourself the while: ‘Is this the condition that I feared?’”
It is not asceticism in the religious sense either. The Stoics were not trying to mortify the flesh or escape the body. They were not interested in the kind of discomfort that becomes an end in itself. Musonius Rufus, who is probably the most systematic Stoic thinker on this subject, was clear: the practice is training, like an athlete’s training. The athlete does not run in the rain because rain is good. The athlete runs in the rain to be ready for anything.
And it is not a performance. Seneca mocks the Stoics who wear conspicuously rough clothing and eat conspicuously plain food in public, turning voluntary hardship into a kind of philosophical theatre. “This is not philosophy,” he says, “but a display.” The practice is private. Its audience is yourself.
The three purposes of voluntary discomfort
The Stoics had three distinct rationales for the practice, each of which stands up independently.
1. Fear reduction
The most important purpose is the one Seneca states explicitly: to test the fears we carry about losing comfort, and to discover that they are almost always larger than their object. We are afraid of being cold, hungry, embarrassed, inconvenienced. We build our lives around avoiding these things. We make decisions — about jobs, relationships, where to live — based partly on the desire to never have to face them.
Voluntary discomfort puts the fear to the test. You spend a day eating plain food. You take a cold shower. You sleep on a harder surface than usual. You wear the same clothes for a week. And you discover — almost always — that the feared thing is not what you were afraid of. This discovery, made through experience rather than argument, is far more powerful than any philosophical reassurance. The fear loses its grip because you have looked at the reality and found it manageable.
This connects directly to premeditatio malorum — the morning practice of imagining things going wrong. Voluntary discomfort is the physical version of the same move. You are not just imagining hardship; you are trying it. The combination is very powerful: imagine it in the morning, practise it occasionally in the body. Together they produce a person for whom the range of genuinely frightening futures is dramatically smaller than it is for everyone else.
2. Gratitude amplification
The second purpose is the inverse of the first: not to discover that hardship is bearable, but to rediscover that comfort is extraordinary. After a day of deliberately simple food, ordinary food tastes remarkable. After sleeping on the floor, your bed feels like a luxury. After a cold shower, hot water feels like a gift.
The Stoics understood, before the science of hedonic adaptation, what the science now confirms: we adjust rapidly to the good things in our lives and stop noticing them. Voluntary discomfort reverses the adjustment. You cannot take the warm bed for granted on the night you just chose not to sleep in it.
Marcus Aurelius connects this to his broader practice of gratitude — the noticing of what is already present before it is absent. Voluntary discomfort is the most efficient way to make the present vivid. More efficient, in some ways, than imagining loss — because it is the real thing, chosen.
3. Building actual resilience
The third purpose is the most straightforward: if you have practised living on less, you can live on less. If you have practised being cold, being cold does not stop you. If you have practised discomfort, discomfort is not the obstacle it would otherwise be.
Musonius Rufus made his students actually endure hardship as part of their training. He believed — and the modern research on stress inoculation broadly supports this — that the capacity to function under difficult conditions is a skill, and like all skills it can be built by practice. You do not become resilient by thinking about resilience. You become resilient by being repeatedly exposed to manageable difficulty and discovering that you come through it.
Epictetus, who had been a slave, did not need to be convinced that the external conditions of life could be brutal. His entire philosophy was built around the discovery that what could not be taken from you — your judgement, your response, your will — was precisely what mattered. Voluntary discomfort is the practice by which you test that claim. You discover that your functioning is not, in fact, contingent on the comfort you have been treating as non-negotiable.
What voluntary discomfort looks like in practice
Seneca’s version — a few days each month of deliberately reduced circumstances — is probably the most practical template. Here are some ways to adapt it.
The simple food day. Once a week or month, eat nothing that requires preparation. Bread, fruit, whatever is plainest. No coffee if you depend on it. No restaurant. Notice how you feel by the end of the day. Notice what the food you eat the next day tastes like.
The cold shower. The most accessible version, and one with physiological benefits that the Stoics could not have measured but are now reasonably well documented (alertness, mood, resilience to cold stress). Three minutes under cold water. The first thirty seconds are the hardest. The rest is surprising. Most people report, within a week of making it a habit, that the anticipatory dread is worse than the reality — exactly Seneca’s point.
The technology fast. A modern version the Stoics could not have imagined but would immediately have recognised: a day, or a weekend, without the phone, the news, the notifications. The discomfort is real — the withdrawal symptoms of constant connection are not trivial — and the benefit, in terms of discovering what you actually want to do with your attention, is considerable.
The deliberate difficulty. Walk instead of taking the car, when the car is available. Take the stairs. Carry the heavy thing. Sleep with the window open. None of these individually are significant. Together, as a pattern of chosen small difficulty, they are the practical expression of what the Stoics were after: a self that is not entirely controlled by its preference for the path of least resistance.
The periodic reduction. Once a month, live for a day or a weekend on the minimum. The minimum of food, comfort, entertainment, social stimulation. Alone with yourself and whatever is actually essential. Seneca’s version. It tends to be more confronting than the cold shower, and more revelatory.
The fear test
Seneca’s formulation is worth returning to: “Is this the condition I feared?” That question, asked honestly at the end of a period of voluntary discomfort, is the core of the practice. Not “was this pleasant?” — it probably was not. Not “would I choose this indefinitely?” — you would not. But: was the reality as bad as the fear?
The answer, almost always, is no. And that no is transformative, because it reveals something about the structure of fear itself. The fear is a prediction about experience. The practice tests the prediction. When the prediction is wrong — as it almost always is — the fear loses its grip. Not just on that specific discomfort, but more broadly. Because the discovery generalises. If the fear was wrong about this, it was probably wrong about other things too.
This is why the Stoics considered voluntary discomfort a philosophical practice and not merely a physical one. It produces knowledge — not abstract knowledge about hardship, but embodied knowledge about your own capacity, your own flexibility, your own relationship to the conditions you have been treating as non-negotiable. That knowledge changes how you move through the world. It makes you, in the precise Stoic sense, freer. (For the related practice of working through what you fear before it arrives, see our guide to premeditatio malorum.)
Start with one thing
The cold shower is the easiest entry point, for the same reason Seneca recommends starting with manageable reductions rather than dramatic ones. You want the practice to be real, not theatrical. Real enough to produce the genuine discomfort that makes the test meaningful. Small enough that you actually do it.
Tomorrow morning: cold water for three minutes. Ask yourself, at the end of it: was this the condition I feared? Then go about your day. See if it looks slightly different — slightly more manageable, slightly less contingent on everything going right — than it did yesterday. If it does, you have found the beginning of something. The Stoics called it resilience. They also called it freedom. They were not wrong on either count.