“Race hate isn't human nature; race hate is the abandonment of human nature.”

Sade, act 1, scene 12 (p. 24)
Marat/Sade (1963)

Source: Agricola (98), Chapter 42; reported in Bartlett's Familiar Quotations, 10th ed. (1919)

Source: Brave New World Revisited (1958), Chapter 12 (p. 113)

Of Atheism
Essays (1625)

Source: Castle Series, Castle in the Air (1990), p. 31.
Context: "Maybe," he said, "you should be more careful about whom you let your dog bite."
"Not I!" said Jamal. "I am a believer of free will. If my dog chooses to hate the whole human race except myself, it must be free to do so."

As quoted in "Epiphanies in Sepia and Umber" by Matthew Gurewitsch, in The Wall Street Journal, (15 March 2005)
Context: In the next 25 years, the human race will have to decide whether or not to preserve the bestiary of Nature’s living masterpieces. Ashes and Snow is not meant to tell people to do some things and not to do other things. It’s meant to inspire. I hope it’s not a requiem.

Our America (1881)
Context: There can be no racial animosity, because there are no races. The theorist and feeble thinkers string together and warm over the bookshelf races which the well-disposed observer and the fair-minded traveller vainly seek in the justice of Nature where man's universal identity springs forth from triumphant love and the turbulent hunger for life. The soul, equal and eternal, emanates from bodies of different shapes and colors. Whoever foments and spreads antagonism and hate between the races, sins against humanity.

"My Six Conversions, § II : When the World Turned Back" in The Wells and the Shallows (1935)
Context: The Church never said that wrongs could not or should not be righted; or that commonwealths could not or should not be made happier; or that it was not worth while to help them in secular and material things; or that it is not a good thing if manners become milder, or comforts more common, or cruelties more rare. But she did say that we must not count on the certainty even of comforts becoming more common or cruelties more rare; as if this were an inevitable social trend towards a sinless humanity; instead of being as it was a mood of man, and perhaps a better mood, possibly to be followed by a worse one. We must not hate humanity, or despise humanity, or refuse to help humanity; but we must not trust humanity; in the sense of trusting a trend in human nature which cannot turn back to bad things.