Letter 18, “On Festivals and Fasting,” is one of the most practically influential letters Seneca ever wrote — the origin of a Stoic exercise still practiced today. He’s writing during the December Saturnalia, Rome’s wild holiday season of feasting, gift-giving, and revelry, and he weighs how a thoughtful person should handle the festivities: neither joining the excess wholesale nor stiffly holding himself apart. But then he pivots to his famous recommendation — the practice of deliberately setting aside certain days to live on the plainest food and roughest clothes, asking yourself all the while, “Is this the condition I so feared?” This is the root of what we now call voluntary discomfort or “practicing poverty.” Seneca’s insight is that the time to prepare the soul for hardship is while things are still easy — we should make friends with poverty before we’re ever forced into it, the way a soldier trains in peacetime. He closes with a borrowed line on anger: that ungoverned anger breeds madness.
From Seneca to Lucilius
It’s December, and the city is in a sweat. The general merrymaking has official license. Everything echoes with enormous preparations — as if the Saturnalia were any different from an ordinary workday! The difference has shrunk to nothing, which makes me think the man had it right who said: “December used to be a month; now it’s the whole year.”
How Should We Handle the Holidays?
If I had you here, I’d gladly ask what you think we should do: keep to our usual routine, or — so as not to seem out of step with everyone else — dine more festively and set aside the formal toga. In the old days we changed our dress only when the state was in turmoil and times were grim; now we change it for pleasure, for the holiday.
If I know you, playing the umpire you’d have wanted us to be neither exactly like the holiday crowd in their party caps nor entirely unlike them. Though perhaps this is precisely the season to lay down the law to the soul, and command it to abstain from pleasures at the very moment the whole mob has plunged into them. This is the surest proof of your own steadiness: neither chasing the things that seduce and lure you toward luxury, nor being swept into them.
The Harder Discipline: Blend In Without Giving In
It takes real courage to stay dry and sober while the crowd is drunk and vomiting. But it takes greater self-control not to withdraw and set yourself apart — to do what the crowd does, only differently — neither making a spectacle of yourself nor becoming one of them. Because you can keep a holiday without extravagance.
The Practice: Rehearse the Thing You Fear
Still, I’m so set on testing the steadiness of your mind that I’ll give you a lesson drawn from the teaching of great men. Set aside a certain number of days on which you’ll content yourself with the scantiest, cheapest fare and coarse, rough clothing — and ask yourself all the while: “Is this the condition I so feared?”
It’s precisely in carefree times that the soul should toughen itself in advance for harder ones; it’s while Fortune is generous that it should fortify itself against her violence. In peacetime the soldier drills, throws up earthworks against no enemy, and wears himself out with unnecessary labor so he’ll be equal to the necessary kind when it comes. If you don’t want a man to panic in a crisis, train him before the crisis arrives. That’s what those men were doing who, imitating poverty, brought themselves nearly to want each month — so that they’d never flinch at what they had so often rehearsed.
Make It Real, Not a Costume Party
Don’t imagine I mean the fashionable playacting — the mock “paupers’ dinners” and toy “poor huts” that wealthy people use to relieve their boredom. Let the cot be a real one, the cloak genuinely coarse, the bread hard and gritty. Endure it for three or four days at a stretch, sometimes longer, so it’s a real test of yourself and not just a hobby.
Then, I promise you, Lucilius, you’ll leap for joy at being filled by a pennyworth of food, and you’ll understand that peace of mind doesn’t depend on Fortune — because even when she’s angry, she still grants enough for our actual needs.
You’re Only Doing What Millions Do Daily
Don’t suppose, though, that you’re doing anything heroic. You’ll only be doing what many thousands of slaves and many thousands of poor people do every single day. But give yourself credit for this: you’re doing it without being forced, and it will be as easy for you to endure it permanently as to try it now and then.
Let’s practice our strokes on the training-post. Let’s get on familiar terms with poverty, so Fortune can’t catch us off guard. We’ll enjoy our wealth far more comfortably once we’ve learned how little of a burden poverty really is.
Even Epicurus Fasted
Even Epicurus — the great teacher of pleasure — kept set days on which he satisfied his hunger only meagerly, wanting to see whether this left him short of full and complete happiness, and if so by how much, and whether the shortfall was worth any great effort to avoid. He says as much in his famous letter to Polyaenus. He boasts that he fed himself on less than a penny, while Metrodorus, not yet so far along, needed a whole one.
Do you think there can be any fullness in such a diet? There is — and pleasure too. Not the shifty, fleeting kind that needs constant fresh stimulation, but a pleasure steady and sure. Water, barley-meal, and crusts of barley bread are no cheerful menu — yet the highest pleasure of all is to be able to take pleasure in such food, and to have reduced your needs to that minimum which no unfairness of Fortune can strip away.
Forestalling Fortune’s Blows
Even prison rations are more generous; even the executioner doesn’t feed the condemned so plainly. So what a noble soul it takes to descend of your own free will to a diet that even the death-sentenced needn’t fear! This is genuinely getting ahead of Fortune’s spear-thrusts.
So begin, Lucilius, to follow these men’s practice. Set apart certain days to withdraw from your affairs and make yourself at home with the barest fare. Open up business relations with poverty.
Dare, my friend, to scorn the sight of wealth,
and shape yourself into kinship with your God.
Possess Wealth Without Fearing Its Loss
For only the person who has scorned wealth is truly akin to God. I’m not forbidding you to own wealth — I want you to reach the point where you possess it without fear. And the only way to do that is to convince yourself that you could live happily without it as well as with it — always regarding riches as ready to slip away.
A Closing Word on Anger
But now I need to fold up the letter. “Settle your debts first!” you cry. Here’s a draft on Epicurus; he’ll pay the sum: “Ungoverned anger breeds madness.” You can’t help knowing how true this is — you’ve had both slaves and enemies.
This emotion flares up against everyone; it springs as readily from love as from hate, and shows up as much in serious matters as in jest and play. And what matters isn’t how great the provocation is, but what kind of soul it lands in. It’s like fire: what matters isn’t the size of the flame but what it falls on. Solid timber turns away a great blaze; dry, flammable stuff feeds the smallest spark into an inferno. So it is with anger, Lucilius — the end of a mighty anger is madness. And so anger should be avoided not merely to keep us from excess, but to keep our minds healthy.
Farewell.
Breaking It Down: A Modern Take on Letter 18
Letter 18 has quietly become one of the most influential letters in the whole collection, because it contains a concrete, repeatable exercise that modern Stoics still practice: deliberately rehearsing hardship while times are good. But the letter also has a lot to say about how to hold your ground in a culture of excess without becoming either a reveler or a killjoy. Here’s what stands out for a modern reader:
1. When the Holiday Becomes the Whole Year
Seneca’s opening jab lands perfectly in a modern consumer culture: “December used to be a month; now it’s the whole year.” He’s noting how the special occasion has bled into everything — how the exception has become the rule, and constant indulgence has erased the very thing that made the festival feel like a festival. When every day is a celebration, nothing is. The observation feels, if anything, even truer of our always-on, always-consuming age than of his.
2. Blend In Without Giving In
Seneca rejects the easy extremes and names a harder, subtler discipline: “do what the crowd does, only differently — neither making a spectacle of yourself nor becoming one of them.” The show-off ascetic who loudly refuses to celebrate is just performing in the opposite direction. The real skill is participating in shared life — keeping the holiday — “without extravagance,” present and warm but not swept away. It’s the same balance as Letter 5: different on the inside, unremarkable on the outside.
3. Rehearse the Thing You Fear
The heart of the letter, and its most famous exercise: “Set aside a certain number of days on which you’ll content yourself with the scantiest, cheapest fare and coarse clothing — and ask yourself: ‘Is this the condition I so feared?'” So much of our anxiety is fear of losing what we have. Seneca’s remedy is to go and meet that feared condition voluntarily, briefly, on your own terms — and discover it’s survivable, even fine. The dreaded thing, actually experienced, almost always turns out smaller than the dread of it.
4. Prepare in Peacetime
The principle behind the practice: “it’s precisely in carefree times that the soul should toughen itself for harder ones… while Fortune is generous, it should fortify itself against her violence.” We tend to do the opposite — coasting when life is easy and scrambling only when trouble hits. But the time to build resilience is before you need it, “the way a soldier drills against no enemy.” You can’t start training for the storm once you’re already in it.
5. Make It Real, Not a Costume Party
Seneca is scathing about performative hardship: not “the mock paupers’ dinners that wealthy people use to relieve their boredom,” but a real cot, a genuinely coarse cloak, hard and gritty bread, endured for several days “so it’s a real test of yourself and not just a hobby.” The distinction matters enormously today, when “minimalism” and “digital detoxes” can become their own kind of luxury cosplay. The exercise only works if the discomfort is genuine and you can’t opt out at the first pang.
6. You’ll Leap for Joy at a Crust of Bread
A surprising promised payoff: “you’ll leap for joy at being filled by a pennyworth of food.” Voluntary discomfort doesn’t just build toughness — it radically resets your capacity for pleasure. After a few plain days, simple food tastes extraordinary. Deprivation, used deliberately and briefly, is the cure for the hedonic treadmill: it restores our ability to enjoy the ordinary things that abundance had made invisible.
7. You’re Only Doing What Millions Do Daily
A humbling and humane check on self-congratulation: “you’ll only be doing what many thousands of slaves and many thousands of poor people do every single day.” Seneca refuses to let the exercise become a source of pride — and in doing so quietly acknowledges the real, involuntary poverty of millions. There’s genuine humility here, and a reminder worth carrying: what you’re bravely “practicing” for a few days is someone else’s whole life. It should breed solidarity, not vanity.
8. Steady Pleasure vs. Shifty Pleasure
Seneca draws a crucial distinction, backed by Epicurus’s own fasting: there’s “not the shifty, fleeting kind of pleasure that needs constant fresh stimulation, but a pleasure steady and sure.” The pleasures of luxury demand ever more novelty to keep delivering — the treadmill again. But the quiet pleasure of needing little, of finding real satisfaction in simple things, is stable and self-renewing. One kind of pleasure owns you; the other, you own.
9. Reduce Your Needs to What Can’t Be Taken
The strategic core of the practice: “to have reduced your needs to that minimum which no unfairness of Fortune can strip away.” Every need you can shed is a handle Fortune can no longer grab you by. By learning to be content with little, you shrink your own vulnerability — you give the world fewer ways to hurt you. It’s not about hating comfort; it’s about not being hostage to it.
10. Possess Wealth Without Fearing Its Loss
A balanced and non-puritanical conclusion: “I’m not forbidding you to own wealth — I want you to reach the point where you possess it without fear.” Seneca isn’t preaching renunciation. He was himself a wealthy man. The goal is inner freedom within your circumstances: to hold your possessions loosely, “always regarding riches as ready to slip away,” so that having them is a comfort rather than a source of dread. Own your things without letting them own you.
11. Practicing Poverty Makes Wealth More Enjoyable
A delightfully counterintuitive benefit: “We’ll enjoy our wealth far more comfortably once we’ve learned how little of a burden poverty really is.” Once you’ve proven to yourself that you’d be okay with little, the anxiety drains out of having much. The fear of losing it — which quietly poisons a lot of comfortable lives — loses its grip. Paradoxically, rehearsing poverty is what finally lets you relax and enjoy prosperity.
12. Ungoverned Anger Breeds Madness
The closing gift, and a sharp piece of psychology: “what matters isn’t how great the provocation is, but what kind of soul it lands in.” Anger is like fire — “solid timber turns away a great blaze; dry, flammable stuff feeds the smallest spark into an inferno.” The size of the offense matters less than the condition of the person receiving it. Which means the work isn’t mainly about avoiding provocations (you can’t); it’s about becoming the kind of solid, seasoned soul that a spark can’t set ablaze.
Key Takeaways from Letter 18
- When the holiday becomes the whole year, nothing feels special. Constant indulgence erases the very thing it chases.
- Blend in without giving in. Keep the holiday without extravagance — neither reveler nor killjoy.
- Rehearse the thing you fear. Meet the dreaded condition voluntarily and discover it’s survivable.
- Prepare in peacetime. Build resilience before you need it, like a soldier drilling against no enemy.
- Make it real, not a costume party. Genuine discomfort you can’t opt out of — not luxury cosplay.
- Deprivation resets pleasure. A few plain days make simple food taste extraordinary.
- You’re only doing what millions do daily. Let it breed solidarity and humility, not pride.
- Seek steady pleasure, not shifty pleasure. One kind needs constant novelty; the other you actually own.
- Reduce your needs to what can’t be taken. Every need you shed is a handle Fortune can’t grab you by.
- Possess wealth without fearing its loss. Hold your things loosely; own them without being owned.
- Practicing poverty makes wealth more enjoyable. Proving you’d be fine with little drains the dread from having much.
- Ungoverned anger breeds madness. Become the solid soul a spark can’t set ablaze.
“Set aside a certain number of days on which you’ll content yourself with the scantiest fare and coarsest clothing — and ask yourself: ‘Is this the condition I so feared?'”
— Seneca, Letter 18
Next up: Letter 19 — On Worldliness and Retirement
