Lesson 8 · about 50 minutes
Virtue and Character
How virtues are good habits built by repeated choices, the four cardinal virtues, and virtue as a mean between two vices.
By the end of this lesson you will be able to
- Define a virtue as a stable habit that makes a person and their actions good
- Name and define prudence, justice, fortitude and temperance, with an example of each
- Apply the idea of the "golden mean" - for example, courage as the mean between cowardice and recklessness
Read first
- Ethics — The good, the virtues and human flourishing.
Start here: how did you learn to ride a bike?
Nobody learns to ride a bike by reading about it. You get on, wobble, fall off, try again, and slowly it becomes easier. One day you realise you are riding without even thinking about it.
Character works the same way. Lesson 7 showed that happiness in this life comes through virtue. This lesson is about what virtue is, and how you get it.
What a virtue is
A virtue is a stable habit that makes a person good and makes their actions good.
Three things are worth noticing:
- A habit, not a feeling. Feeling generous once doesn’t make you generous. A virtue is a settled disposition that shows up reliably.
- Built by practice. Aristotle says we become just by doing just acts, and brave by doing brave acts, just as builders become builders by building.
- It makes good action easier. For a virtuous person, doing the right thing becomes natural, even enjoyable, rather than a constant struggle.
The opposite of a virtue is a vice: a bad habit built the same way, by repeated bad choices. Every choice you make is quietly shaping one or the other.
The four cardinal virtues
“Cardinal” comes from the Latin cardo, meaning “hinge”. These four virtues are the hinges on which the whole moral life turns. Aquinas explains that there are exactly four because each perfects a different part of us (Lesson 6):
| Virtue | What it does | Perfects | Example |
|---|---|---|---|
| Prudence | Sees what is right to do here and now | Reason | Thinking before you post something online |
| Justice | Gives each person what is due to them | The will | Keeping a promise, paying back what you borrowed |
| Fortitude | Faces difficulty and danger for a good reason | The emotions that flee from hard things | Standing up for someone being picked on |
| Temperance | Moderates our desire for pleasures | The emotions that crave pleasure | Putting your phone away to sleep or study |
Prudence comes first, because it guides the others. Without prudence, courage can turn into foolishness and generosity into waste.
The golden mean
Aristotle noticed that most virtues sit between two vices: one of too much, one of too little.
| Too little | Virtue | Too much |
|---|---|---|
| Cowardice | Courage | Recklessness |
| Stinginess | Generosity | Wastefulness |
| Shyness and coldness | Friendliness | Flattery |
| Lack of interest in pleasure | Temperance | Self-indulgence |
The mean isn’t about being average or lukewarm. It’s about hitting the target: doing the right thing, to the right degree, at the right time, for the right reason. That is why prudence matters so much: it is what finds the mean.
Beyond the natural virtues
The cardinal virtues can be gained by human effort. The Christian tradition adds three theological virtues: faith, hope and charity. These are gifts from God that direct us to Him, the perfect happiness we met in Lesson 7. They don’t replace the natural virtues; they perfect and raise them.
Why this matters
You won’t become a good person by one big decision. You become good through thousands of small ones: getting up on time, telling the truth when it’s awkward, being kind to someone left out, saying no to one more episode. Good character is built, one choice at a time.
Read the texts
Read Aristotle, Nicomachean Ethics II.1 and II.6, then Summa Theologica I-II, q.61, a.2. As you read, ask:
- Why does Aristotle say virtue is neither in us by nature nor against our nature?
- How does Aquinas link each cardinal virtue to a different power of the soul?
Primary texts
- Aristotle, Nicomachean Ethics II.1 We become just by doing just acts, and brave by doing brave acts.
- Aristotle, Nicomachean Ethics II.6 Virtue is a mean between two vices, one of excess and one of deficiency.
- St Thomas Aquinas, Summa Theologica I-II, q.61, a.2 Why there are exactly four cardinal virtues.
Check your understanding
Choose an answer for each question, then check your score.
Think and discuss
Talk these over with your class or family, or write a short answer to each.
- Is it easier to do the right thing the tenth time than the first? Why?
- Which cardinal virtue do young people today most need? Which is most mocked?
- Can someone be brave in a bad cause? Is that real fortitude without prudence and justice?
- How do phones and constant entertainment affect the virtue of temperance?
- Pick one small habit to build this week. Which virtue does it train?
Key takeaway
Good character is built, one choice at a time.
Homework: Choose one small habit that trains a virtue - for example, getting up when your alarm goes off, or putting your phone away at meals. Practise it every day for a week and write a few sentences on what changed.