 However, in Metaphysics Murdoch amends her moral philosophy in one quite substantial way. She now thinks the moral life cannot do without duty, and that duty is not simply an expression of moral vision or attention. She says that there are several different “modes of ethical being” besides moral vision/attention/Eros/purification, that co-exist with it in a larger “field of force”, involving tension between the different modes (MGM 1992: 492). Duty is the most important of these. Her conception of duty is like Kant’s in certain respects and contrary to it in others.