After looking carefully into the matter, and after some years' experience in its non-use, I can state without hesitancy that, contrary to the prevailing opinion, the flesh of animals is not necessary as an article of food. … We shall find numerous articles of food, as we study the matter, that, so far as body nourishing, building, and sustaining qualities are concerned, contain twice, and in some cases over twice, as much as any flesh food that can be mentioned.

pp. 25-26 - Every Living Creature (1899)