In the Sandman, Season of Mists 07, after Lucifer gives the key of Hell to Dream, he gives it to the angels. At the end of the issue, one of the angels come up to one of the demons and says that he should punish him for punishment, he should punish him for redemption.
That was the old Hell. That was a place of mindless torture and purposeless pain. There will be no more wanton violence; no further suffering inflicted without reason or explanation
And the person who is getting the punishment says:
But you don' understand. That makes it worse. That makes it so much worse...
What is the reason behind that? Maybe there's a language barrier or some biblical knowledge that I don't know but I don't understand why getting a punishment for redemption is worse than getting a punishment for torture and why whould the punishee says that.