"Let us compare the callousness / compassion of classical utilitarianism and NU. / [I]magine if a magic genie offers me super-exponential growth in my bliss at the price of exponential growth in your agony and despair. If I'm a classical utilitarian, then I am ethically bound to accept the genie's offer. Each year, your torment gets unspeakably worse as my bliss becomes ever more wonderful. Indeed, the thought I'm ethically doing the right thing increases my bliss even further! By generating so much net bliss, I'm the most saintly person who ever existed! If you knew how incredibly superhumanly wonderful I'm feeling, then you'd realise that my super-bliss easily offsets your tortured despair. Your tortured despair is a trivial pinprick in comparison to my super-exponentially growing bliss! / Of course, as a real-life negative utilitarian, I'd politely decline the genie's offer. / But if you win me over to classical utilitarianism, I'll accept. / Which is the callous choice?"
January 1, 1970
https://en.wikiquote.org/wiki/Negative_utilitarianism