“Some eat animals, some eat the plants. None can survive without eating either of them. The doctrine of Ahimsa is difficult to sustain.”
Flowers of Wisdom
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Sarvajna 26
Kannada poet, pragmatist and philosopherRelated quotes

“The case for meat-eaters - if eating meat is a sin, then why are some plants carnivorous?”
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Dark Rooms (2002)

to say nothing of their share of the other social benefits which the rest of us are supposed to furnish, such as education and artistic gratification.
Direct Action (1912)

Slowly of course! Unless you are from Harvard
Source: What On Earth Is About To Happen… For Heaven’s Sake? (2013), p. 47-48

From his Humanity show; quoted in "Ricky Gervais chooses vegan," Vegetarians of Washington (13 September 2017) https://vegofwa.org/tag/ricky-gervais/

“What do you do when you see an endangered animal that eats only endangered plants?”

“You can't eat hope,' the woman said.
You can't eat it, but it sustains you,' the colonel replied.”
Source: El coronel no tiene quien le escriba