Seneca is sick for the morning, recovers by afternoon, and promptly gets dragged into a dinner-table debate: what is the “cause” of things? He walks Lucilius through the Stoic answer, Aristotle’s four causes, and Plato’s five, using the image of a sculptor making a bronze statue, and asks him to judge. Then a friend objects that all this is a waste of time, and Seneca’s reply is the heart of the letter: big questions lift the soul, give it room to breathe, and help free us from fear. “Let’s be brave in the face of danger,” he concludes, and don’t let the body’s troubles reach the mind.
A note for readers: one short passage reflects ancient Roman views about the soul parting from the body. The heart of this letter is wonder at the universe and living without fear. If you or someone you love is struggling, please reach out — in the US, call or text 988 (Suicide and Crisis Lifeline); help is available in most countries.
From Seneca to Lucilius
Yesterday I split my day with ill health. It claimed the whole morning for itself, but in the afternoon it gave way to me. So first I tested my spirit by reading; then, when reading turned out to be possible, I dared to ask more of my spirit, or perhaps I should say, to allow it more. I wrote a little, and with more concentration than usual, because I’m wrestling with a difficult subject and don’t want to be beaten. In the middle of this, some friends came to see me, intending to use force and restrain me, as if I were a sick man indulging in some excess.
So conversation took the place of writing, and I’ll pass on to you the question from that conversation that’s still under debate, for we’ve appointed you referee. You have more work on your hands than you think, because the argument has three sides.
Cause and Matter
Our Stoic philosophers, as you know, say there are two things in the universe from which everything comes: cause and matter. Matter lies inert, a substance ready for any use, but bound to stay idle if no one sets it in motion. Cause, by which we mean reason, shapes matter and turns it in whatever direction it likes, producing all sorts of particular things. So for each thing there must be that from which it is made, and then an agent by which it is made. The first is its material, the second its cause.
All art is just an imitation of nature. So let me apply these general principles to the things people make. A statue, for example, required matter to be worked on by the artist, and an artist to give form to the matter. So in the case of the statue, the material was bronze and the cause was the craftsman. And so it is with everything: all things consist of what is made and the one who makes it.
Aristotle’s Four Causes
The Stoics believe in only one cause, the maker. But Aristotle thinks the word “cause” can be used in three ways. “The first cause,” he says, “is the matter itself, without which nothing can be created. The second is the craftsman. The third is the form that is stamped on every work, a statue, for example.” This last is what Aristotle calls the eidos. “There is also,” he says, “a fourth: the purpose of the work as a whole.”
Let me show you what this means. Bronze is the “first cause” of the statue, because it could never have been made unless there was something from which it could be cast and molded. The “second cause” is the artist, because without a craftsman’s skilled hands that bronze couldn’t have been shaped into the statue’s outline. The “third cause” is the form, since our statue could never be called The Spear-Bearer or The Boy Tying His Hair unless this particular shape had been stamped on it. The “fourth cause” is the purpose of the work, because if there had been no purpose, the statue wouldn’t have been made.
So what is this purpose? It’s what drew the artist on, what he pursued when he made the statue. It may have been money, if he made it to sell; or fame, if he worked for his reputation; or religion, if he made it as a gift for a temple. So this, too, is a cause that contributes to making the statue. Or do you think we should leave out, among the causes of a thing that’s been made, the one element without which it wouldn’t have been made at all?
Plato’s Fifth Cause
To these four Plato adds a fifth cause, the model, which he himself calls the “idea.” For this is what the artist looked at when he created the work he had decided to make. It makes no difference whether the model is outside him, so that he can turn his eyes to it, or inside him, conceived and placed there by himself. God holds within himself the models of all things; his mind contains the harmonies and proportions of the entire universe of things to be made. He is filled with these shapes that Plato calls “ideas,” imperishable, unchangeable, not subject to decay. And so, though individual people die, humanity itself, the idea of a human being after which each person is shaped, lives on; and though people toil and perish, it suffers no change.
So there are five causes, as Plato says: the material, the agent, the form, the model, and the end in view. Last comes the result of them all. Take the statue again, to go back to the image we began with: the material is the bronze, the agent is the artist, the form is the shape fitted to the material, the model is the pattern the agent imitates, the end in view is the purpose in the maker’s mind, and finally, the result of all these is the statue itself.
The universe too, in Plato’s view, has all these elements. The agent is God; the source is matter; the form is the shape and arrangement of the visible world. The model is surely the pattern by which God made this vast and most beautiful creation. The purpose is his aim in making it. Do you ask what God’s purpose is? It is goodness. Plato, at any rate, says: “What was God’s reason for creating the world? God is good, and no one who is good begrudges anything good. So God made it the best world possible.”
So hand down your verdict, judge. Tell us who seems to you to say what is most likely true, not who says what is absolutely true; for that is as far beyond our grasp as truth itself.
Too Many Causes, or Too Few
This crowd of causes that Aristotle and Plato define takes in either too much or too little. For if they count as “causes” of something to be made everything without which it can’t be made, they’ve named too few. Time must be counted among the causes, since nothing can be made without time. They must also include place, since if there’s no place where a thing can be made, it won’t be made. And motion too: nothing is made or destroyed without motion. There’s no art without motion, and no change of any kind.
But what I’m looking for now is the first, the general cause. This must be simple, since matter too is simple. Do we ask what cause is? It is surely creative reason, in other words, God. For the elements you listed aren’t a long series of independent causes; they all depend on one alone, and that is the creative cause.
Do you claim that form is a cause? It’s only what the artist stamps on his work; it’s part of a cause, but not the cause. Nor is the model a cause, but an indispensable tool of the cause. The artist needs his model the way he needs his chisel or his file; without them his art can make no progress. Still, these things are neither parts of the art nor its causes. “Then,” you may say, “the artist’s purpose, what leads him to set out to create something, is the cause.” It may be a cause; but it isn’t the efficient cause, only an accessory one. And there are countless accessory causes, whereas what we’re discussing is the general cause. Besides, Plato and Aristotle aren’t up to their usual sharpness when they claim that the whole universe, the finished work, is a cause. There’s a great difference between a work and the cause of a work.
Why Ask Such Questions?
Either give your verdict, or, as is easier in cases like this, declare that the matter isn’t clear and call for a new hearing. But you’ll answer: “What pleasure do you get from wasting your time on problems like these, which free you from none of your emotions and rout none of your desires?” For my part, I study and discuss them as things that do a great deal to calm the spirit, and I search myself first, and then the world around me.
And even now I’m not wasting my time, as you think. For all these questions, as long as they aren’t chopped up and torn apart into useless hair-splitting, lift and lighten the soul, which is weighed down by a heavy burden and longs to be freed and to return to the elements it once belonged to. For this body of ours is a weight on the soul and its punishment. Under the pressure of that load, the soul is crushed and held captive, unless philosophy has come to its aid, told it to take fresh courage by contemplating the universe, and turned it from earthly things to divine ones. There it has its freedom; there it can roam. Meanwhile it escapes the custody in which it is held and renews its life in the heavens.
Rest for Tired Eyes
Think of skilled craftsmen who have been working on some delicate piece that strains their eyes, when the light they have is poor or uncertain. They go out into the open air, to some park set aside for the public’s enjoyment, and refresh their eyes in the generous light of day. In the same way, the soul, shut up as it has been in this gloomy, darkened house, seeks the open sky whenever it can, and in contemplating the universe it finds rest.
The wise person, and the one who seeks wisdom, is closely bound to the body, it’s true, but is absent from it as far as the better self is concerned, and keeps his thoughts fixed on lofty things. Bound, as it were, by an oath of service, he regards his lifetime as his term of duty. He is trained so that he neither loves nor hates life; he bears his mortal lot, though he knows a larger one awaits him.
Must I Live With My Head Bowed?
Do you forbid me to contemplate the universe? Do you force me to withdraw from the whole and limit me to a part? May I not ask what the beginnings of all things are? Who shaped the universe? Who took the confused, jumbled mass of inert matter and separated it into its parts? May I not ask who the master builder of this universe is, how its vast bulk was brought under law and order, who gathered the scattered atoms, who separated the disordered elements and gave outward form to things that lay in one vast shapelessness? Or where all this expanse of light came from? And whether it is fire, or something even brighter than fire?
Am I not to ask these questions? Must I be ignorant of the heights from which I came down? Whether I’m to see this world only once, or be born many times? Where I go afterward? What home awaits my soul when it’s released from its servitude here among humans? Do you forbid me a share in heaven? In other words, do you want me to live with my head bowed down?
The Body Is Not the Self
No, I’m above that kind of existence. I was born for something greater than to be my body’s servant, and I regard this body as nothing but a chain that shackles my freedom. So I put it forward as a kind of buffer against Fortune, and I won’t let any wound pass through it to my soul. For my body is the only part of me that can be injured. In this dwelling, exposed as it is to danger, my soul lives free.
This flesh will never drive me to fear, or to any pretense unworthy of a good person. I will never lie for the sake of this small body. When the time seems right, I will part company with it. And for now, while we’re bound together, our partnership won’t be one of equals: the soul will bring every dispute before its own court. To look down on the body’s demands is sure freedom.
Brave in the Face of Danger
To return to our subject: this freedom is greatly helped by the contemplation we were just talking about. All things are made of matter and God. God governs matter, which surrounds him and follows him as its guide and leader. And what creates, that is, God, is more powerful and more precious than matter, which God acts upon.
God’s place in the universe corresponds to the soul’s place in a human being. The matter of the world corresponds to our mortal body. So let the lower serve the higher. Let’s be brave in the face of danger. Let’s not fear injustice, or wounds, or chains, or poverty. And what is death? It’s either an end or a change. I have no fear of ceasing to exist; it’s the same as never having begun. Nor do I shrink from passing into another state, because in no condition will I be as cramped as I am now.
Farewell.
Breaking It Down: A Modern Take on Letter 65
Letter 65 has two halves. The first is a technical tour of ancient theories of causation: the Stoics’ single creative cause, Aristotle’s four causes, and Plato’s added “idea,” all illustrated by a sculptor and his bronze. The second half answers the question many readers will have by then: why bother? Seneca says big questions about the universe lift and steady the soul. His language about the body as a prison reflects ancient Stoic and Platonic thought, as does one brief line about the soul eventually parting from it; we read these today as old philosophy, not advice. Modern wellness would add that caring for the body matters too. What endures is Seneca’s real point: the body’s troubles don’t have to reach the mind, and fear doesn’t have to rule us.
1. Keep your mind working, even when you’re unwell
Sick all morning, Seneca reads and writes in the afternoon because “I’m wrestling with a difficult subject and don’t want to be beaten.” Gentle mental effort can be part of recovering, not a betrayal of rest.
2. Friends who look out for us
His friends arrive to stop him from overworking. It’s a small, warm picture of friendship: people who notice when we push too hard.
3. Everything has a maker and a material
“All things consist of what is made and the one who makes it.” The Stoics saw reason shaping matter everywhere. It’s a reminder that we, too, shape the raw material of our days.
4. Purpose shapes the work
A sculptor may work for money, fame, or devotion. Aristotle’s “purpose” cause invites us to ask why we do what we do, since our reasons shape the result.
5. The world was made from goodness
Asked why God made the world, Plato answers: “It is goodness.” Whatever our beliefs, there’s something hopeful in seeing the world as rooted in generosity rather than chance alone.
6. Aim for the most likely truth
Seneca asks Lucilius to judge who says what seems most likely true, since absolute truth is beyond our grasp. It’s a humble, honest way to approach hard questions.
7. Look within, then outward
“I search myself first, and then the world around me.” Self-knowledge and curiosity about the universe aren’t rivals. Each helps the other.
8. Big questions lighten us
Studied without hair-splitting, such questions “lift and lighten the soul.” Thinking about something vast can shrink our worries back to their proper size.
9. Step into the open air
Like craftsmen resting strained eyes in a public park, the soul “seeks the open sky whenever it can, and in contemplating the universe it finds rest.” A walk under the sky, a look at the stars: these are real medicine for a tired mind.
10. Neither love nor hate life
The wise person “neither loves nor hates life” but serves faithfully through it. Seneca means not clinging so tightly that fear takes over, while still doing our work with care.
11. Keep your head up
“Do you want me to live with my head bowed down?” Curiosity about where we come from and where we’re going is part of being human. No one should be told to stop wondering.
12. You are more than your body
“I was born for something greater than to be my body’s servant.” Pain and illness can affect the body without defining who we are.
13. Integrity over comfort
“I will never lie for the sake of this small body.” Fear for our safety or comfort shouldn’t push us into dishonesty.
14. Courage over fear
“Let’s be brave in the face of danger.” Injustice, injury, and poverty are real, but they don’t have to command the mind. That inner freedom is what Seneca wants for Lucilius, and for us.
Key Takeaways from Letter 65
- Use your good hours well. Even a hard day can hold some learning.
- Value friends who check on you. They see what we miss.
- Notice what shapes things. Reason working on raw material.
- Ask why you do what you do. Purpose shapes the result.
- Stay humble about truth. Seek what’s most likely, not what’s certain.
- Know yourself, then the world. Both deserve your curiosity.
- Let big questions lift you. They put worries in proportion.
- Get under the open sky. Wonder is rest for the mind.
- Don’t let the body rule the mind. You are more than your aches.
- Stay honest under pressure. Never lie out of fear.
- Be brave. Danger needn’t reach your inner freedom.
“Let’s be brave in the face of danger.”
— Seneca, Letter 65
Next up: Letter 66 — On Various Aspects of Virtue
