Key takeaways
- The four are wisdom, courage, justice and temperance. The Stoics inherited them from Socrates rather than inventing them.
- Each was defined as a form of knowledge, not as a habit or a personality trait.
- They are inseparable. On the Stoic view you cannot be courageous and intemperate, because both are the same knowledge applied to different material.
- Each cardinal virtue had named sub-virtues, which is where the list stops being abstract.
- Modern Stoic lists usually add four more practices. Those are useful, but they are not the cardinal four.
The four Stoic virtues get printed constantly and explained rarely. Presented as a list of four nouns they read like anyone's list of four nouns, and the version most people carry away is roughly be smart, be brave, be fair, do not overdo it.
The Stoic account is stranger and tighter than that. Here is what each one meant, where the definitions come from, and why the school insisted you cannot have one of them on its own.
What are the four Stoic virtues?
Wisdom, courage, justice and temperance. In the ancient sources the set appears as prudence, justice, courage and moderation, which are the same four under older English names.
They did not originate with the Stoics. The Internet Encyclopedia of Philosophy traces the cardinal four to Socrates, who argued in Plato that these virtues are the only good and that everything else is neither good nor bad in itself. The Stoics took that over wholesale and built a system on it.
The competing position was Aristotle's. He listed twelve virtues and held that virtue was necessary but not sufficient for a flourishing life, since you also needed a degree of health, wealth and education. That is the commonsense view. The Stoics rejected it.
Why did they call virtues "knowledge"?
Because they thought virtue is the perfected condition of human reason, and knowledge is the highest thing reason can achieve. So the virtues are not dispositions you build by repetition. They are things you either know or do not.
The Stanford Encyclopedia of Philosophy gives the worked example: the virtue of courage just is knowledge of what should be endured and feared. Not the capacity to act while afraid, which is how the word is normally used. Knowledge of what is genuinely worth fearing.
That has an uncomfortable consequence the Stoics accepted. Since knowledge is all or nothing, so is virtue. You are not eighty percent courageous.
What did each virtue actually mean?
| Virtue | Defined as knowledge of | Named sub-virtues |
|---|---|---|
| Wisdom (practical wisdom, phronesis) | What should be done | Good judgment, discretion, resourcefulness |
| Courage | What should be endured and feared | Perseverance, confidence, magnanimity |
| Justice | Living rightly among others | Piety, kindness, sociability |
| Temperance | What is choiceworthy | Propriety, sense of honor, self-control |
The sub-virtues come from Stobaeus and they are the most useful part of the scheme, because they are specific enough to check yourself against. Resourcefulness is a form of wisdom. Sociability is a form of justice. Neither of those is obvious from the four headline words.
The other framing the sources offer is that three of the four are wisdom pointed in different directions: justice is practical wisdom applied to social life, courage is wisdom about endurance, and temperance is wisdom about matters of choice.
Why can you not have just one?
Because of what the definitions require. To know what should be endured, you have to know what is worth doing, which is wisdom, and what is worth choosing, which is temperance. Take any one virtue seriously and the others come with it.
So the Stoics held that whoever has one virtue has them all. Chrysippus put the point sharply: you cannot be courageous and yet intemperate, in the Stoic sense of those words.
That is not how the words work in ordinary speech, where a brave man with no self-control is an entirely familiar figure. The Stoic reply is that such a person does not have courage, he has nerve, and the two are different because one involves knowing something.
Was the unity of the virtues agreed on?
Not entirely, and the disagreement is the most interesting thing in the doctrine. Zeno described each virtue as a kind of wisdom. Cleanthes read that strictly, so that all the virtues are literally one thing: wisdom. Chrysippus read it more loosely, so that each virtue is a branch of wisdom.
The difference sounds academic and is not. On the strict reading the four names are just four ways of pointing at one state. On the pluralist reading they are genuinely distinct, related the way branches are related to a trunk.
Chrysippus won, in the sense that his version is what came down to us, which is why we have four names and a list of sub-virtues rather than one word.
Why these four and not others?
Because the Stoics thought they matched what human beings naturally do. The IEP sets out the developmental story: we act to advance our own interests, we come to identify with other people's interests in widening circles, and we work out how to navigate whatever happens.
Temperance and courage are what pursuing our goals requires. Justice is the natural extension of that widening circle of concern, from parents to friends to countrymen. Practical wisdom is what lets you handle whatever arrives.
So the list is not arbitrary and it is not a moral wish list. It is an account of what a rational social animal has to get good at, derived from a claim about what we are. That claim comes out of their physics, which is the part of the system most modern summaries leave out.
What about amor fati and memento mori?
They are not cardinal virtues, and it is worth being clear about that even though modern Stoic practice almost always includes them. The usual expanded list adds amor fati, memento mori, the dichotomy of control and voluntary discomfort to the four.
Those four additions are practices rather than virtues, and they are not equally ancient. The dichotomy of control is straight from Epictetus. Memento mori is a genuine Greek and Roman theme that acquired its Latin tag much later. Amor fati is Nietzsche's phrase, coined in 1882.
None of that makes the expanded list wrong to use. It is how Stoicism is actually practiced now, and the piece that lists all eight together reflects that. It is just worth knowing which four are the doctrine and which four are the toolkit.
How would you actually use them?
As four questions rather than four aspirations. The nouns do nothing on their own, but the definitions convert cleanly into things you can ask about a decision in front of you.
- Wisdom: do I actually know what should be done here, or am I guessing and calling it instinct?
- Courage: is this genuinely worth fearing, or does it only feel that way?
- Justice: what does this look like from the other side, including to people outside the room?
- Temperance: is this worth choosing, or am I choosing it because it is available?
That is the whole method, and it is closer to an audit than to a motivational exercise. The Stoics were not interested in how you felt about the answers.
Where should you read next?
Epictetus, because he is the most practical and because the dichotomy of control is the entry point to everything else. His verified lines are short enough to work with directly.
For the virtues specifically, the ancient material is scattered and mostly survives in summaries, so the encyclopedia entries above will serve you better than any single text. The pieces built on this material sit in the Stoic wall art collection.
Featured Stoic pieces
Frequently asked questions
What are the four Stoic virtues?
Wisdom, courage, justice and temperance, which appear in older translations as prudence, courage, justice and moderation. The Stoics inherited the set from Socrates rather than devising it.
How did the Stoics define courage?
As knowledge of what should be endured and feared. Not the ability to act while afraid, but knowing what is genuinely worth fearing, which is why they classed it as a form of knowledge.
Can you have one Stoic virtue without the others?
Not on the Stoic view. Whoever has one virtue has them all, because each is defined in terms that require the others. Chrysippus held you cannot be courageous and intemperate.
Are amor fati and memento mori Stoic virtues?
No. They are practices commonly added to modern Stoic lists alongside the dichotomy of control and voluntary discomfort. Only the cardinal four are virtues in the doctrine.
What are the Stoic sub-virtues?
Wisdom covers good judgment, discretion and resourcefulness; courage covers perseverance, confidence and magnanimity; justice covers piety, kindness and sociability; temperance covers propriety, sense of honor and self-control.
