“The creed which accepts as the foundation of morals ... the Greatest Happiness Principle, holds that actions are right in proportion as they tend to produce happiness, wrong as they tend to produce the reverse of happiness. By happiness is intended pleasure, and the absence of pain; by unhappiness, pain and the privation of pleasure.""

"Suppose there were an experience machine that would give you any experience you desired. Superduper neuropsychologists could stimulate your brain so that you would think and feel you were writing a great novel, or making a friend, or reading an interesting book. All the time you would be floating in a tank, with electrodes attached to your brain ... Would you plug in? What else can matter to us, other than how our lives feel from the inside?"

"Act in such a way that you always treat humanity, whether in your own person or the person of any other, never simply as a means, but always at the same time as an end."