Taking its cue from the Supreme Court of Canada's constitutionalization of the criminal law's unwritten general part, this article illustrates the interaction between criminal law theory and constitutional law that process implies. It does so by applying a criminal law theory of why and when force in self-defence is justified in order to assess the constitutionality of the self-defence provisions of Canada's Criminal Code. The assessment concludes that, though frequently criticized for excessive complexity, the Code's provisions on self-defence accurately track the nuances demanded by the theory of self-defence best qualified to interpret the provisions. That theory, I argue, puts dignity rather than self-preservation at its centre.