What a difference between the human world and the world of the animal, between the elevation of man and the abasement of the animal, between the perfections of man and the ignorance of the animal, between the light of man and the darkness of the animal, between the glory of man and the degradation of the animal! An Arab child of ten years can manage two or three hundred camels in the desert, and with his voice can lead them forward or turn them back. A weak Hindu can so control a huge elephant that the elephant becomes the most obedient of servants. All things are subdued by the hand of man; he can resist nature while all other creatures are captives of nature: none can depart from her requirements. Man alone can resist nature. Nature attracts bodies to the center of the earth; man through mechanical means goes far from it and soars in the air. Nature prevents man from crossing the seas; man builds a ship, and he travels and voyages across the great ocean, and so on; the subject is endless. For example, man drives engines over the mountains and through the wildernesses, and gathers in one spot the news of the events of the East and West. All this is contrary to nature. The sea with its grandeur cannot deviate by an atom from the laws of nature; the sun in all its magnificence cannot deviate as much as a needle’s point from the laws of nature, and can never comprehend the conditions, the state, the qualities, the movements and the nature of man. What, then, is the power in this small body of man which encompasses all this? What is this ruling power by which he subdues all things? One more point remains. Modern philosophers say: “We have never seen the spirit in man, and in spite of our researches into the secrets of the human body, we do not perceive a spiritual power. How can we imagine a power which is not sensible?” The theologians reply: “The spirit of the animal also is not sensible, and through its bodily powers it cannot be perceived. By what do you prove the existence of the spirit of the animal? There is no doubt that from its effects you prove that in the animal there is a power which is not in the plant, and this is the power of the senses—that is to say, sight, hearing and also other powers; from these you infer that there is an animal spirit. In the same way, from the proofs and signs we have mentioned, we argue that there is a human spirit. Since in the animal there are signs which are not in the plant, you say this power of sensation is a property of the animal spirit; you also see in man signs, powers and perfections which do not exist in the animal; therefore, you infer that there is a power in him which the animal is without.”