Abstract: Most scholarly discussions of autism and religion presuppose the absent self theory of autism. The theory holds that autistic persons lack a sense of self and anticipates that they will have trouble relating to a personal God and assigning religious meaning to their lives. I argue that the theory is untestable, which leaves scholars of religion with a choice: either we can say, with proponents of the absent self theory, that autistic persons lack a self, a choice that cuts religious studies off from the lived theologies of autistic persons of faith; or we can view autistic persons of faith as authority voices on their religious self-experience. As an example of what scholars of religion stand to gain by choosing the latter, I present an ethnography of autistic Christians in three web communities. These autistic Christians construct a distinctively Christian understanding of neurodiversity and a distinctively aspie understanding of God.