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. Should you plug into this machine for life, preprogramming your life experiences?...Of course, while in the tank you won't know that you're there; you'll think that it's all actually happening...Would you plug in?
Robert NozickThrough the evolutionary process, those who are able to engage in social cooperation of various sorts do better in survival and reproduction.
Robert NozickEvolutionary cosmology formulates theories in which a universe is capable of giving rise to and generating future universes out of itself, within black holes or whatever.
Robert NozickAnd although it might be best of all to be Socrates satisfied, having both happiness and depth, we would give up some happiness in order to gain the depth.
Robert Nozick