Does Repeating Right Actions Make Us Good?

In Book II of the Nicomachean Ethics, Aristotle says that virtue does not arrive fully formed by nature. We become just by doing just acts, much as we become musicians by playing. This places character within ordinary practice: one good deed may be accidental, while repeated action can form more stable patterns of feeling and choice.

He immediately adds an important limit. Producing an action that conforms to justice does not yet make someone just. Virtuous action also requires the person to know what they are doing, choose the act for its own sake, and act from a settled character. A child who returns a shopping trolley only after being prompted produces the right result. When the child later notices that an abandoned trolley obstructs others and returns it without being told, practice has begun to become character.

This also explains why habit is both important and dangerous. Repetition does not automatically make conduct good. Repeated avoidance, dishonesty or obedience to an unjust rule can form opposing dispositions. Education and social settings may first arrange opportunities for practice, but mature virtue must gradually turn external direction into judgement that can read a situation.

My view is that repeating right actions supplies the material from which character can form; it is not a moral certificate. Its value lies in training attention, emotion and choice so that relevant reasons remain visible in a new situation. If someone can only copy an action, without understanding when it is appropriate, why it matters or when a rule should be revised, they have acquired skill or compliance rather than complete virtue.

https://classics.mit.edu/Aristotle/nicomachaen.2.ii.html
https://plato.stanford.edu/entries/aristotle-ethics/