Full Idea
If someone asked me 'Is justice itself just or unjust?' I should answer that it was just, wouldn't you? I agree.
Gist of Idea
If asked whether justice itself is just or unjust, you would have to say that it is just
Source
Plato (Protagoras [c.391 BCE], 330c)
Book Reference
Plato: 'Protagoras and Meno', ed/tr. Guthrie,W K C [Penguin 1956], p.62