“There are probably no creatures that require more the protective Divine word against the presumption of man than the animals, which, like man, have sensations and instincts, but whose body and powers are nevertheless subservient to man. In relation to them man so easily forgets that injured animal muscle twitches just like human muscle, that the maltreated nerves of an animal sicken like human nerves, that the animal being is just as sensitive to cuts, blows and beating as man. Thus man becomes the torturer of the animal soul, which has been subjected to him only for the fulfilment of humane and wise purposes; sometimes out of self-interest, at other times in order to satisfy a whim, sometimes out of thoughtlessness—yes, even for the satisfaction of crude satanic desire.”

Horeb: A Philosophy of Jewish Laws and Observances, translated by Isidor Grunfeld, London: Soncino Press, 1968, vol. II https://books.google.it/books?id=tEIIAAAAIAAJ, p. 292, sec. 415.