THE ARTICLE · 9 MIN
Letters from a Stoic is the English name for the letters that the Roman writer Seneca sent, or presented as sent, to his friend Lucilius in the last years of his life. Here are their big ideas in our own words, which famous Seneca lines are really in them, what two modern studies found, and some small practices drawn from them.
If you are struggling or thinking about suicide, please reach out now. findahelpline.com lists free, confidential helplines worldwide. In the US and Canada, call or text 988. In the UK and Ireland, call Samaritans on 116 123. In Australia, call Lifeline on 13 11 14. In India, call Tele-MANAS on 14416. In the Philippines, call the National Center for Mental Health crisis line on 1800-1888-1553 (or 1553 from a Luzon landline). If you are in immediate danger, call your local emergency number.
Some of the letters discuss death, including the view, argued in Letter 70, that a person may choose when to die. This page describes that view as part of the history of ideas. It is not guidance, and nothing here is medical advice.
About the book
Lucius Annaeus Seneca was born in Corduba, in Spain, around the turn of the era: the Stanford Encyclopedia of Philosophy gives c. 1 BCE, and Penguin gives c. 4 BC. He was exiled to Corsica in 41, and after his return to Rome he became tutor to the young Nero and, from 54, one of the emperor’s advisers. The letters come from the brief period, 62 to 65, that he spent in retirement before Nero ordered his death.
The Latin collection is the Epistulae Morales ad Lucilium, the Moral Letters to Lucilius. It survives as 124 letters in 20 books, but the Roman writer Aulus Gellius quotes from “the twenty-second book”, so some of it is lost. The English title Letters from a Stoic belongs to a 1969 Penguin Classics selection, chosen and translated by Robin Campbell. Penguin’s own description calls the letters “essays in disguise”. Whether every letter was really sent is not something we could settle from the sources we read; the Stanford Encyclopedia notes that Seneca “creates a literary persona for himself”.
What we read: the full Latin text on The Latin Library, and Richard M. Gummere’s Loeb translation on Wikisource, which was published in three volumes, the last in 1925. Gummere’s translation is out of copyright in the US but not in the UK or EU, so we quote it only in short lines, credited, and otherwise give the Latin with our own plain rendering, marked as ours. Letters are cited by letter and section (13.4 is Letter 13, section 4).
The big ideas
1. Time is the one thing that is truly yours
The first letter opens with vindica te tibi, which we would render “claim yourself back for yourself”, and asks Lucilius to notice where his time is taken, stolen or simply lost. A little further on comes the line people quote: “Nothing, Lucilius, is ours, except time” (1.3, Gummere). Just before it is dum differtur vita transcurrit: while things are put off, life runs past (our rendering).
2. Read a few writers deeply, and take good ideas from anywhere
Letter 2 warns against skimming many authors: “Everywhere means nowhere” (2.2, Gummere). Yet Seneca made a habit, in the early letters, of closing with a saying, and he takes many of them from Epicurus, the founder of a rival school: in the Latin text, Epicurus is named in at least 21 of the first 29 letters. Seneca says he crosses into the enemy camp “not as a deserter, but as a scout” (2.5, Gummere), and later: “Whatever is well said by anyone is mine” (16.7, Gummere).
3. Fear runs ahead of the facts
“There are more things, Lucilius, likely to frighten us than there are to crush us; we suffer more often in imagination than in reality” (13.4, Gummere). In the next section he lists three ways this happens: some things torment us more than they should, some before they should, and some when they should not torment us at all (13.5).
4. Rehearse hardship while life is easy
Letter 18 suggests setting aside a few days to live on the cheapest food and in rough clothes, and asking: “Is this the condition that I feared?” (18.5, Gummere). The mind, he argues, should prepare in calm times, the way a soldier drills when no enemy is in sight (18.6).
5. Philosophy is for living
Facere docet philosophia, non dicere: philosophy teaches doing, not talking (20.2, our rendering). The same letter asks that a person’s life not be out of tune with their words. Seneca does not claim to have arrived: in Letter 27 he says he is not so shameless as to cure others “when I am ill myself”, and shares the remedy as if the two of them lay “ill in the same hospital” (27.1, Gummere).
6. Choose your company
Letter 7 says crowds pass their vices on to us, and that he comes home from the arena’s games worse than he went. Its advice: “Associate with those who will make a better man of you” (7.8, Gummere). A change of place is not a cure, either: Letter 28 tells a gloomy traveller, “You need a change of soul rather than a change of climate” (28.1, Gummere).
7. A slave is a person
Letter 47 opens its argument with Servi sunt. Immo homines, “They are slaves. No: they are people” (our rendering). Seneca asks masters to eat with their slaves and talk with them, and gives a rule of thumb: “Treat your inferiors as you would be treated by your betters” (47.11, Gummere). It is a plea for humane treatment, not for ending slavery (see the cheat sheet).
8. Death is part of every day
Seneca returns to death again and again. In Letter 24 he takes up a well-known saying, which Lucilius had been using, that we die every day, because some of our life is taken from us daily (24.19–20). Letter 70 argues that the wise person may choose when to leave life, because “living is not a good; living well is” (non enim vivere bonum est, sed bene vivere, 70.4, our rendering). Letter 78 shows another side of him. Ill in his youth, he writes, he often wanted to end his life, but the thought of his elderly father held him back: “For sometimes it is an act of bravery even to live” (78.2, Gummere).
What holds up
Most of the lines we checked are in the text: time as the one thing that is ours, reading a few authors well, rehearsing hardship, and the plea in Letter 47. Two popular quotes do not belong here: the “luck” line is not in the letters at all, and “fire tests gold” comes from a different essay. The line about fear is real, but a shorter version that circulates online drops the words “more often”. Two modern studies of worry, both in people with an anxiety disorder, found that most of the worries people recorded did not come true. The rows below give each claim, the verdict and the source.
Did he live by it?
This question is as old as the letters. Tacitus reports an enemy of Seneca’s asking how he had “within four years of royal favour amassed three hundred million sesterces” (Annals 13.42), and the historian Cassius Dio lists the same fortune among the ways Seneca’s conduct contradicted his philosophy (61.10.3). Both are hostile witnesses. In Tacitus’s account, Seneca offered his property back to Nero in 62 and then withdrew from public life (14.53–56). Seneca had also answered the charge himself, in his essay On the Happy Life: the wise man “does not love riches, but he prefers to have them” (21, tr. Aubrey Stewart, 1900).
His death in 65 came after a conspiracy against Nero was discovered. Tacitus writes that Nero acted “not because he had convicted him of the conspiracy” (Annals 15.60, tr. Church & Brodribb). Whether Seneca’s life weakens or deepens the letters is a judgement each reader makes; the sources above are where both sides start.
How to use it
These are practices drawn from the letters. Apart from the worry studies named in item 2, they are Seneca’s own suggestions, described here, not tested treatments.
- A time check at the end of the day. Letter 1 asks where time went: taken by others, stolen, or let slip. One way to apply it is to note, at night, one hour that would have been better spent another way.
- A worry record. Letter 13 says we suffer “more often in imagination than in reality” (13.4, Gummere). The two studies above asked people (in the 2026 trial, half of them) to write down a worry and later record whether it happened; most had not. Those studies were of people with an anxiety disorder, as part of treatment, so they show what happened in that group, not a rule for everyone.
- A small rehearsal of hardship. Letter 18’s practice is a few days of plain food and plain clothes, asking whether this is really the thing that was feared. It is a practice of perspective, not a diet.
- Fewer books, read twice. Letter 2’s advice is to stay with a few authors long enough to digest them.
- A line a day. Seneca ended early letters with one saying worth keeping, his “customary contribution” (8.7, Gummere). The same habit can be applied to any reading: copying one line a day, whoever wrote it.
Who it’s for, and who can skip it
It suits readers who like their philosophy in short, personal pieces they can read one at a time, and anyone curious about where many popular Stoic sayings come from. The letters are not a system: they repeat themselves, wander into Plato’s theory of being (Letter 58) and literary style (Letter 114), and assume a world of slaves and arena games. Readers who want a short handbook may prefer Epictetus; readers who want one Seneca essay could start with On the Shortness of Life. Anyone in distress is better served by the helplines above than by any book.
If you liked this
- Stoicism, explained: where the school came from, and what Epictetus, Seneca and Marcus Aurelius taught.
- Your fears, answered by the Stoics: more of Letter 13, and the passages from Marcus Aurelius and Epictetus on the same fears.
- 18 Stoicism quotes, checked, with the source of each line.
- Older Than You Think, which traces “life is long enough” to Seneca’s On the Shortness of Life.
Sources
- Seneca, Epistulae Morales ad Lucilium, Latin text, books 1–20 (The Latin Library).
- Seneca, Moral Letters to Lucilius, tr. Richard M. Gummere, Loeb Classical Library (Wikisource), Letters 1, 2, 7, 13, 16, 18, 20, 24, 28, 47, 70 and 78.
- Seneca, De Providentia 5.9 (The Latin Library); On Benefits 7.1, tr. Aubrey Stewart, 1887 (Wikisource); Of a Happy Life 21, tr. Aubrey Stewart, 1900 (Wikisource).
- Robin Campbell (sel. and tr.), Letters from a Stoic (Penguin, 1969): Open Library record and Penguin UK page.
- K. M. Vogt, “Seneca”, Stanford Encyclopedia of Philosophy.
- Aulus Gellius, Attic Nights 12.2, tr. J. C. Rolfe (LacusCurtius).
- Tacitus, Annals 13.42, 14.52–56 and 15.60, tr. A. J. Church and W. J. Brodribb (Wikisource).
- Cassius Dio, Roman History 61.10, tr. Earnest Cary (LacusCurtius); Juvenal, Satires 10.16 (The Latin Library).
- L. S. LaFreniere and M. G. Newman, “Exposing worry’s deceit: percentage of untrue worries in generalized anxiety disorder treatment”, Behavior Therapy 51 (2020).
- J. T. Schwob and M. G. Newman, “A brief ecological momentary intervention for generalized anxiety disorder”, Journal of Anxiety Disorders 120 (2026).
Checked October 2026. What we read: the whole Latin text of the letters, Gummere’s translation of all 124 letters (searched in full, read closely for the letters cited), the other Seneca passages named above, the Tacitus, Dio, Gellius and Juvenal passages, the Stanford Encyclopedia entry, the Penguin and Open Library records, and the abstracts of the two worry studies. We did not read Robin Campbell’s 1969 translation itself, so we cannot say which letters his selection includes.
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