Full Idea
Plato, Spinoza, La Rochefoucauld, and Kant are four spirits very different from one another, but united in one thing: their low estimation of pity.
Gist of Idea
Plato, Spinoza and Kant are very different, but united in their low estimation of pity
Source
Friedrich Nietzsche (On the Genealogy of Morals [1887], Pref §5)
Book Reference
Nietzsche,Friedrich: 'On the Genealogy of Morals/ Ecce Homo', ed/tr. Kaufmann,Walter [Vintage 1969], p.19
A Reaction
Plato is no surprise, as virtually no Greeks value pity. Spinoza and Kant are interesting. Presumably Kant's 'contractualism' places respect far above pity, and is theoretical neglect of animals would fit. Remember Nietzsche embraced a horse in Turin.