What is the Good? And how do we define it? Since different people have defined it differently, how can we know there is any good? Some say the good is found in happiness, but how do we know what happiness is? And how can happiness be defined? Happiness and good are not objective terms. We cannot deal with them scientifically. And since they aren’t objective, they just exist in your mind. So if you want to be happy just change your mind. Ha-ha, ha-ha.
— Zen and the Art of Motorcycle Maintenance by Robert M. Pirsig