Those who promise us paradise on earth never produced anything but a hell.
Philosophers should consider the fact that the greatest happiness principle can easily be made an excuse for a benevolent dictatorship. We should replace it by a more modest and more realistic principle -- the principle that the fight against avoidable misery should be a recognized aim of public policy, while the increase of happiness should be left, in the main, to private initiative.
Science may be described as the art of systematic over-simplification.
Good tests kill flawed theories; we remain alive to guess again.