Full Idea
It is from the repeated performance of just and temperate acts that we acquire virtues.
Clarification
'Virtue' here is the Greek word 'areté', which also translates as 'excellence'
Gist of Idea
We acquire virtue by the repeated performance of just and temperate acts
Source
Aristotle (Nicomachean Ethics [c.334 BCE], 1105b04)
Book Reference
Aristotle: 'Ethics (Nicomachean)', ed/tr. ThomsonJ A K/TredennickH [Penguin 1976], p.98
A Reaction
Presumably one can endlessly compel a child or an employee or a slave to perform just and temperate acts, but still not generate the actual virtue.