 According to Avicenna, metaphysics—and no other science—can (and must) establish the existence of a First absolute Principle. Physics, which deals with bodies and their movement, can explain no more than motion (its result is, in fact, a Prime Mover) and, unable to answer the fundamental ontological question about the origin of the world’s being, it simply anticipates the idea of the Principle that metaphysics demonstrates (Ilāhiyyāt, I, 1, 6, 17–7, 6; I,2,14–end).