“We are all animals of this planet. We are all creatures. And nonhuman animals experience pain sensations just like we do. They too are strong, intelligent, industrious, mobile, and evolutional. They too are capable of growth and adaptation. Like us, firsthand foremost, they are earthlings. And like us, they are surviving. Like us they also seek their own comfort rather than discomfort. And like us they express degrees of emotion. In short like us, they are alive.”

“The thing is, we all have a little animal in us, and if you ask us to, we can do a very good job of behaving like one.”

“People talk about human intelligence as the greatest adaptation in the history of the planet. It is an amazing and marvelous thing, but in evolutionary terms, it is as likely to do us in as to help us along.”

“Humans — who enslave, castrate, experiment on, and fillet other animals — have had an understandable penchant for pretending animals do not feel pain. A sharp distinction between humans and 'animals' is essential if we are to bend them to our will, make them work for us, wear them, eat them — without any disquieting tinges of guilt or regret. It is unseemly of us, who often behave so unfeelingly toward other animals, to contend that only humans can suffer. The behavior of other animals renders such pretensions specious. They are just too much like us.”

“Adversity is like a strong wind. I don't mean just that it holds us back from places we might otherwise go. It also tears away from us all but the things that cannot be torn, so that afterward we see ourselves as we really are, and not merely as we might like to be.”

“If we cannot live entirely like human beings, at least let us do everything in our power not to live entirely like animals.”