Instead Butler argues for an ethics based precisely on the limits of self-knowledge as the limits of responsibility itself. Any concept of responsibility which demands the full transparency of the self to itself, an entirely accountable self, necessarily does violence to the opacity which marks the constitution of the self it addresses. The scene of address by which responsibility is enabled is always already a relation between subjects who are variably opaque to themselves and to each other. The ethics that Butler envisions is therefore one in which the responsible self knows the limits of its knowing, recognizes the limits of its capacity to give an account of itself to others, and respects those limits as symptomatically human. To take seriously one's opacity to oneself in ethical deliberation means then to critically interrogate the social world in which one comes to be human in the first place and which remains precisely that which one cannot know about oneself. In this way, Butler locates social and political critique at the core of ethical practice.