Cultures are not the source of all morals, only a limited set of morals. Cultures can be graded and judged morally according to their contribution to the evolution of life.
Robert M. PirsigThe Good was not a form of reality. It was reality itself, ever-changing, ultimately unknowable in any kind of fixed, rigid way.
Robert M. PirsigA person isn't considered insane if there are a number of people who believe the same way. Insanity isn't supposed to be a communicable disease. If one other person starts to believe him, or maybe two or three, then it's a religion.
Robert M. PirsigIt was the ghost of rationality itself ... This is the ghost of normal everyday assumptions which declares that the ultimate purpose of life, which is to keep alive, is impossible, but that this is the ultimate purpose of life anyway, so that great minds struggle to cure diseases so that people may live longer, but only madmen ask why. One lives longer in order that he may live longer. There is no other purpose. That is what the ghost says.
Robert M. Pirsig