47. Lacunae in Aristotle's Theodicy. -- The theodicy of Aristotle is a bold and powerful presentation of theism; but it reveals, on some fundamental questions, lacunae afterwards filled in by the genius of scholasticism. It is darkened by a persistent doubt about the personality of the Divinity; the notion of the Divine personality is necessarily vitiated by the supposition that will-activity is incompatible with the immutability of a purely actual being. Then, too, the relations between God and the world are by no means happily handled: God does not know the world; hence He cannot be its providence. Efficient or motor activity in the strict sense is regarded as incompatible with the Divine nature. On the other hand, the final causality of the prime mover is not easy to grasp, and it lands its author into a theory of Nature (50) at variance with some of his metaphysical teaching. Finally the existence itself of any beings outside God remains an enigma.