 Moore also gave some weight to the hedonic states of pleasure and pain. He thought the former a very minor good, saying pleasure on its own at most has limited and may have no value, but he thought pain a very great evil, which there is a serious duty to prevent (1903: 212–13, 222–23/1993: 260–61, 270–71) His view therefore involved a value-asymmetry, with pain a much greater evil than pleasure is a good. This had not been the traditional view; most hedonists had held that a pleasure of a given intensity is exactly as good as a pain of the same intensity is evil (e.g. Sidgwick 1907: 413). But Moore thought it intuitively compelling that the pain is worse; if that makes the theory of value less systematic, so much the worse for system.