" The opportunity for evil in itself does not suffice; people need a rationale as well. Consider how unpleasant, how awkward it must be when your neighbor, catching his breath (and that can happen anytime), screams, 'Why?' - or, 'Aren't you ashamed?!' It's embarrassing to stand there without a ready answer. A crowbar makes a poor rebuttal, everybody senses that. The whole trick lies in having the proper grounds to brush aside such aggravating objections. Contemptuously. Everyone wants to commit a villainy without having to feel like a villain. "

― Stanisław Lem , The Futurological Congress: From the Memoirs of Ijon Tichy