“In the world of animals, pain serves an equivocal role. Parental nips and swipes are common tools in upbringing. And socially, pain is sometimes used to maintain hierarchies of dominance. But this animal use of pain seems somewhat restrained, at least in contrast with the human situation. Here the capacity for pain is often used to systematically exploit and oppress at intensities often far beyond those seen in the behaviour of our nearest primate relatives. At the same time, at least in western culture, pain is rarely used for pleasure. Is it little wonder that all pain is viewed as intrinsically evil? Or that the pain-pleasure of leatherspace has been labelled torture?”

“The secret of success is learning how to use pain and pleasure instead of having pain and pleasure use you. If you do that, you're in control of your life. If you don't, life controls you.”

“Many animals experience pain, anxiety and suffering, physically and psychologically, when they are held in captivity or subjected to starvation, social isolation, physical restraint, or painful situations from which they cannot escape. Even if it is not the same experience of pain, anxiety, or suffering undergone by humans- or even other animals, including members of the same species- an individual's pain, suffering, and anxiety matter.”

“Pleasure is never as pleasant as we expected it to be and pain is always more painful. The pain in the world always outweighs the pleasure. If you don't believe it, compare the respective feelings of two animals, one of which is eating the other.”

“A brick could be used to block out the pain, if you use it to first inflict pain and carry it through to coma. 
”

“One simple test of the claim that the pleasure in the world outweighs the pain…is to compare the feelings of an animal that is devouring another with those of the animal being devoured.”