properties; for this cause there is another cause, and for the second a third, and so on. The series of causes ends with the Prime Cause, from which everything derives existence, since it is impossible that the series should continue ad infinitum. He nevertheless does not mean to say that the existence of the Universe is the necessary product of the Creator, i.e., the Prime Cause, in the same manner as the shadow is caused by a body, or heat by fire, or light by the sun. Only those who do not comprehend his words attribute such ideas to him. He uses here the term necessary in the same sense as we use the term when we say that the existence of the intellectus necessarily implies that of the intellectum, for the former is the efficient cause of the latter in so far as intellectum. Even Aristotle holds that the Prime Cause is the highest and most perfect Intellect; he therefore says that the First Cause is pleased, satisfied, and delighted with that which necessarily derives existence from Him, and it is impossible that He should wish it to be different. But we do not call this “design,” and it has nothing in common with design. E.g., man is pleased, satisfied, and delighted that he is endowed with eyes and hands, and it is impossible that he should desire it to be otherwise, and yet the eyes and hands which a man has are not the result of his design, and it is not by his own determination that he has certain properties and is able to perform certain actions. The notion of design and determination applies only to things not yet in existence, when there is still the possibility of their being in accordance with the design or not. I do not know whether the modern Aristotelians understood his words to imply that the existence of the Universe presupposes some cause in the sense of design and determination, or whether, in opposition to him, they assumed design and determination, in the belief that this does not conflict with the theory of the Eternity of the Universe. Having explained this, I will now proceed to examine the opinions of the modern philosophers. CHAPTER XXI