So basically, they're having a discussion after the real villain, Zanza, has been revealed. Zana is basically the god of the main characters. He created them and essentially wants to destroy everything and make everything anew. Well, during this discussion, one of the characters, Dunban, says this amazing quote about Zanza not being above basic morality.

Of course, another character, Alvis immediately tries to say "HURR DURR YOU'RE MORTALS AND GODS ARE ABOVE OUR MORALITY." which is absolute bullshit, but yeah, pretty cool none the less.