Full Idea
One thing is denied even to God: to make what has been done undone again.
Gist of Idea
Even God could not undo what has been done
Source
Agathon (plays (frags) [c.410 BCE]), quoted by Aristotle - Nicomachean Ethics 1139b09
Book Reference
Aristotle: 'Ethics (Nicomachean)', ed/tr. ThomsonJ A K/TredennickH [Penguin 1976], p.206
A Reaction
a quotation - cf the Euthyphro Question