Aziraphale watched, unsure what kind of revelation the young man might have had, but sure it was a rather unpleasant if enlightening one. He should probably offer something uplifting to counteract it, since the part of this conversation has been mostly his own fault to begin with.

"Humanity does plenty of evils on their own, without Divine or Hellish intervention, let me assure you. But they are also capable of much good, so I wouldn't worry too much about Mordegon. It tends to balance out in the end and good largely tends to prevail."