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 the knowledge of the "Divine Chariot," or "the Creation," or explains some principle with respect to Prophecy, or to the belief in any of the truths taught in Scripture. Now, having made this statement, we return to the subject of which we began to treat.

CHAPTER III
THE theory of Aristotle in respect to the causes of the motion of the spheres led him to assume the existence of Intelligences. Although this theory consists of assertions which cannot be proved, yet it is the least open to doubt, and is more systematic than any other, as has been stated by Alexander in the book called The Origin of the Universe. It includes maxims which are identical with those taught in Scripture, and it is to a still greater extent in harmony with doctrines contained in well-known genuine Midrashim, as will be explained by me. For this reason I will cite his views and his proofs, and collect from them what coincides with the teachings of Scripture, and agrees with the doctrine held by our Sages.

CHAPTER IV
THE enunciation that the heavenly sphere is endowed with a soul will appear reasonable to all who sufficiently reflect on it: but at first thought they may find it unintelligible or even objectionable; because they wrongly assume that when we ascribe a soul to the heavenly spheres we mean something like the soul of man, or that of an ass, or ox. We merely intend to say that the locomotion of the sphere undoubtedly leads us to assume some inherent principle by which it moves; and this principle is certainly a soul. For it would be absurd to assume that the principle of the circular motion of the spheres was like that of the rectilinear motion of a stone downward or of fire upwards, for the cause of the latter motion is a natural property and not a soul; a thing set in motion by a natural property moves only as long as it is away from the proper place of its element, but when it has again arrived there, it comes to rest; whilst the sphere continues its circular motion in its own place. It is, however, not because the sphere has a soul, that it moves in this manner; for animate beings move either by instinct or by reason. By" instinct" I mean the intention of an animal to approach something agreeable, or to retreat from something disagreeable; e.g., to approach the water it seeks because of thirst, or to retreat from the sun because of its heat. It makes no difference whether that thing really exists or is merely imaginary, since the imagination of something agreeable or of something disagreeable likewise causes the animal to move. The heavenly sphere does not move for the purpose of withdrawing from what is bad or approaching what is good. For in the first instance it moves toward the same point from which it has moved away, and vice versa it moves away from the same point towards which it has moved. Secondly, if this were the object of the motion, we should expect that the sphere would move towards a certain point, and would then rest; for if it moved for the purpose of avoiding something, and never obtained that object, the motion would be in vain. The circular motion of the sphere is consequently due to the action of some