Full Idea
When a man repents of an act done through ignorance, he is considered to have acted involuntarily; but a man who does not repent of such an act is another case, so he may be said to have acted non-voluntarily.
Gist of Idea
If you repent of an act done through ignorance, you acted involuntarily, not non-voluntarily
Source
Aristotle (Nicomachean Ethics [c.334 BCE], 1110b22)
Book Reference
Aristotle: 'Ethics (Nicomachean)', ed/tr. ThomsonJ A K/TredennickH [Penguin 1976], p.113
A Reaction
It strikes me as crucial to virtue theory that how you acted could be partly decided by your attitude AFTER the event. There is a 'residue' (Hursthouse) to every action, of guilt, pride etc. 'Voluntary' evidently has internal/external components.