
The curve of human capacity for pain actually does seem to sink dramatically and almost precipitously beyond the first ten thousand or ten million of the cultural elite; and for myself, I do not doubt that in comparison with one night of pain endured by a single, hysterical blue stocking, the total suffering of all the animals who have been interrogated by the knife in scientific research is as nothing.
Essay 2, Section 7
On the Genealogy of Morality (1887)