"Caligula" by Camus at the Berliner Ensemble.
A beautiful reference to the movie "The Night Porter".

And Caligula himself of course.

Caligula says: "Those we have killed are always with us. But they are no great trouble. It's those we have loved, those who loved us and whom we did not love; regrets, desires, bitterness and sweetness, whores and gods, the celestial gang!"
(Translation Justin O'Brien)

Caligula may be rotten to the core, but he knows that love and guilt are inseparable.