A familiar criticism of Kant, made by Hegel and his followers, J .S. Mill and others, is that there are no maxims that are in fact contradictory, as required for morality on Kant's view. In this paper, I discuss the suggestion that our capacity for rational reflection itself implies universality, and that it is this universality that obliges us to act morally. I consider the idea that self-understanding depends upon practical identity, and I argue that we are sometimes obliged to act morally because of the nature of practical identity and its role in deliberation and self-awareness.