We Become Just by Doing Just Actions

The Quote

"We become just by doing just actions, temperate by doing temperate actions, courageous by doing courageous actions."

— Aristotle, Nicomachean Ethics, 1103a

Original language: Greek

Historical Context

This passage comes from Book II of the Nicomachean Ethics, where Aristotle lays out his account of how virtues of character (ethikai aretai) are acquired. He begins by distinguishing between intellectual virtues — which are developed mainly through teaching — and virtues of character, which are developed through habit (ethos).

The argument responds to a question that was live in ancient Greek philosophy: Can virtue be taught? The Sophists claimed to teach it; Socrates and Plato explored the question extensively. Aristotle's answer is distinctive: virtues of character are not "taught" in the way mathematics is taught, but they are acquired through repeated practice — the same way a builder becomes a builder by building and a lyre-player becomes skilled by playing.

Meaning

The passage states a principle of moral formation: character is built through action. One does not first become just and then act justly; rather, by performing just actions repeatedly, one develops the disposition that constitutes justice. The same applies to temperance and courage — each virtue is formed by the corresponding practice.

This means that moral development is not primarily a matter of learning rules or acquiring knowledge. It is a matter of training — of developing the right habits through consistent practice. The just person is not someone who knows the definition of justice but someone who, through repeated just action, has developed a stable disposition to act justly.

Philosophical Interpretation

Aristotle's account of habituation has several important features. First, it implies that moral education must begin early — childhood habits shape the disposition that adult moral life builds upon. Second, it implies that the context of moral development matters: one learns justice by participating in just practices, courage by facing situations that call for courage. Third, it implies that virtue is not an all-or-nothing affair but a matter of degree — one becomes progressively more just as one performs more just actions.

This account also addresses a puzzle about moral motivation. If one must already be just to perform a just action, how can one ever begin? Aristotle's answer is that the beginner performs actions that are externally just (they conform to what justice requires) without yet possessing the internal state of the just person. Through repeated practice, the external action gradually shapes the internal disposition, until one acts justly not from external compulsion but from an settled character.

Aristotle's model of virtue as habituated disposition stands in contrast both with traditions that locate virtue in adherence to rules and with traditions that locate it in spontaneous feeling. For Aristotle, the virtuous person is one who has internalized the mean between extremes through practice — who feels and acts at the right time, in the right way, toward the right objects, as a result of developed habit.

Related Concepts

• Virtue: The passage defines virtue not as knowledge or feeling but as a habituated disposition — a stable character trait formed through repeated action.
• Discipline: The formation of virtue requires the discipline of consistent practice; character is built incrementally through action repeated over time.

Related Learning

• Explore the Nicomachean Ethics archive entry for the broader account of virtue and the doctrine of the mean.
• The Greek Philosophy page connects Aristotle's ethics to the tradition of reasoned inquiry.

Sources

1. Aristotle. Nicomachean Ethics. Translated by Terence Irwin. Indianapolis: Hackett, 1999. 1103a.
2. "Aristotle's Ethics." Stanford Encyclopedia of Philosophy. https://plato.stanford.edu/entries/aristotle-ethics/