“I am not interested to know whether vivisection produces results that are profitable to the human race or doesn't...The pain which it inflicts upon unconsenting animals is the basis of my enmity toward it, and it is to me sufficient justification of the enmity without looking further.”

“Of all the animals, man is the only one that is cruel. He is the only one that inflicts pain for the pleasure of doing it.”

“The human race is a race of cowards; and I am not only marching in that procession but carrying a banner.”

“When a man loves cats, I am his friend and comrade, without further introduction.”

“I am quite sure ... I have no race prejudice, and I think I have no color prejudices, nor caste prejudices. Indeed, I know it. I can stand any society. All I care to know is that a man is a human being—this is enough for me; he can’t be any worse.”

“I believe I have no prejudices whatsoever. All I need to know is that a man is a member of the human race. That's bad enough for me.”

“I find that the further I go back, the better things were, whether they happened or not.”