JUPITER, VENUS, AND MERCURY ALSO CONSIDERED ASTROLOGICALLY. Besides, the bodies of the animated beings which move in the heaven may be of different degrees of heat; none of them is cold, as is witnessed to by their location. The planet named Jupiter is a suitable mixture of fire; likewise with Venus. That is why they seem to move harmoniously. As to the fiery planet Mars, it contributes its share to the mixture (of the general action of the stars). As to Saturn, its case is different, because of its distance. Mercury is indifferent, because it assimilates itself easily to all. THE UNIVERSE AS A SINGLE HARMONY.[207] All these planets contribute to the Whole. Their mutual relation, therefore, is one suitable to the universe, just as the organs of an animal are shaped to take part in the organism they constitute.[208] Take, for instance, a part of the body, such as the bile, which serves both the whole animal that contains it, and its special organ, inasmuch as it was necessary to arouse courage, and to oppose the injury of both the whole body, and its special organ. There had to be something similar (to bile) in the universe; that something sweet should soften it, that there be parts that would play the role of eyes, and that all things should possess mutual sympathy by their irrational life.[209] Thus only is the universe one, and thus only is it constituted by a single harmony. How then could it be denied that all these things might be signs, resulting from the laws of analogy? ABSURDITY OF VARIOUS ASTROLOGICAL THEORIES.