“To keep a man (slave or servant) for your own advantage merely, to keep an animal that you may eat it, is a lie. You cannot look that man or animal in the face.”
England's Ideal and Other Papers on Social Subjects (1887), Routledge, 2016, p. https://books.google.it/books?id=53uPCwAAQBAJ&pg=PT71
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Edward Carpenter 19
British poet and academic 1844–1929Related quotes
Sayings of Adarbad Mahraspandan, as quoted in Rachel MacNair, Religions and Nonviolence (2015), p. 88 https://books.google.it/books?id=KvL3CQAAQBAJ&pg=PA88, adapted from R. C. Zaehner, The Teachings of the Magi (1956), p. 110.

“An animal may be ferocious and cunning enough, but it takes a real man to tell a lie.”
Source: The Island of Doctor Moreau (1896), Ch. 21: The Reversion of the Beast Folk

“As long as man eats animals how can cruelty to animals be removed.”
19th World Vegetarian Congress 1967

“Man is an animal that diddles, and there is no animal that diddles but man.”
" Diddling: Considered As One Of The Exact Sciences http://www.classicreader.com/read.php/sid.6/bookid.1390/"; first published as "Raising the Wind" in Saturday Courier (1843-10-14).