People
The best way of avenging thyself is not to become like the wrong-doer.
— Marcus Aurelius · Meditations
Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker defines the best revenge as refusing to resemble the person who did wrong. That redirects attention from what happens to the offender toward one's own conduct. One reading makes keeping a moral difference the response that matters, rather than copying the original behaviour.
Context reviewed