“All good animals have secret lives.”

“I believe that the best way to create good living conditions for any animal, whether it's a captive animal living in a zoo, a farm animal or a pet, is to base animal welfare programs on the core emotion systems in the brain. My theory is that the environment animals live in should activate their positive emotions as much as possible, and not activate their negative emotions any more than necessary. If we get the animal's emotions rights, we will have fewer problem behaviors... All animals and people have the same core emotion systems in the brain.”

“Who shall conceive the horrors of my secret toil as I dabbled among the unhallowed damps of the grave or tortured the living animal to animate the lifeless clay?”

“All human beings have three lives: public, private, and secret.”

“...a secret, like an animal, can evolve. Like an animal, a secret can develop a self-preserving intelligence. Shaglike, mute and thick, a knowledge with a fur: your secret.”

“We all have a right to our private lives; it's living a secret life that gets us in trouble.”