Inaugural newsletter of the Vegan Society, Vegan News no. 1 (November 1944). Quoted in The Oxford Handbook of Animal Studies, edited by Linda Kalof (Oxford University Press, 2017), p. 30 https://books.google.it/books?id=Cdv_DQAAQBAJ&pg=PA30.
“We are built to be effective animals, not happy ones.”
Source: The Moral Animal: Why We Are the Way We Are: The New Science of Evolutionary Psychology
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Robert Wright 3
American journalist, born 1957 1957Related quotes
Source: The Ape that Thought It Was a Peacock: Does Evolutionary Psychology Exaggerate Human Sex Differences? (2013), p. 153

“How can one look happy when he is thinking about the anomalous Zeeman effect?”
Writings on Physics and Philosophy (1994), p. 15
Context: A colleague who met me strolling rather aimlessly in the beautiful streets of Copenhagen said to me in a friendly manner, “You look very unhappy”; whereupon I answered fiercely, “How can one look happy when he is thinking about the anomalous Zeeman effect?”.

“The happiness of the ignorant is but an animal’s paradise.”
Source: Aphorisms and Reflections (1901), p. 199

“This is the trouble with all happiness -all of it is built on top of something men want.”
Source: The Sea of Monsters

“Pleasure is not the cause of happiness; rather, it is the effect.”
Source: The Subtle Art of Not Giving a F*ck (2016), Chapter 4, “The Value of Suffering” (p. 82)

The Best of Gene Wolfe (2009), afterword to "Petting Zoo", p. 432
Nonfiction