“I remember an hypothesis argued upon by the young students, when I was at St. Omer's, and maintained with much learning and pleasantry on both sides, 'Whether supposing that the flavour of a big who obtained his death by whipping (per flagellationem extremem) superadded a pleasure upon the palate of a man more intense than any possible suffering we can conceive in the animal, is man justified in using that method of putting an animal to death?' I forget the decision.”

“One of the main arguments that I make is that although almost everyone accepts that it is morally wrong to inflict “unnecessary” suffering and death on animals, 99% of the suffering and death that we inflict on animals can be justified only by our pleasure, amusement, or convenience. For example, the best justification that we have for killing the billions of nonhumans that we eat every year is that we enjoy the taste of animal flesh and animal products. This is not an acceptable justification if we take seriously, as we purport to, that it is wrong to inflict unnecessary suffering or death on animals, and it illustrates the confused thinking that I characterize as our “moral schizophrenia” when it comes to nonhumans.A follow-up question that I often get is: “What about vivisection? Surely that use of animals is not merely for our pleasure, is it?”Vivisection, Part One: The “Necessity” of Vivisection | Animal Rights: The Abolitionist Approach”

“The big problem of any young person's life is to have models to suggest possibilities. Nietzsche says, 'Man is the sick animal.' Man is the animal that doesn't know what to do with itself. The mind has many possibilities, but we can live no more than one life. What are we going to do with ourselves?”

“But man by his nature is an unnatural animal. If any creature stands a chance of defeating death, it is man.”

“To a man whose mind is free there is something even more intolerable in the sufferings of animals than in the sufferings of man. For with the latter it is at least admitted that suffering is evil and that the man who causes it is a criminal. But thousands of animals are uselessly butchered every day without a shadow of remorse. If any man were to refer to it, he would be thought ridiculous. And that is the unpardonable crime.”

“Man is an animal who more than any other can adapt himself to all climates and circumstances.”