 With regard to the propositional content of religion, or what Russell calls theology, Russell notes that central to the idea of Christianity are belief in God, belief in immortality and, at the very least, “belief that Christ was, if not divine, at least the best and wisest of men. If you are not going to believe that much about Christ, I do not think you have any right to call yourself a Christian” (A1957, 2). Since it is this propositional content that varies from religion to religion, it turns out, as a matter of logic, that at most one religion can be true (A1957, xi).