 Of course, as we all know, astrologers often err in their predictions. Astrological errors can be due to several factors. In general, Gersonides claims, we know very little of the order of the heavenly bodies. “In general, it is impossible for man to know the [complete] truth of the order of the sublunar world. This is nicely illustrated in astrology, where frequently false predictions are made. All the more so is it impossible for man to know the general order of the sublunar world by means of its causes so that his knowledge would be perfect” (Wars, I.12, p. 219). In some cases, the information is not transmitted clearly. Why is it that certain communications are received more clearly than others? A constitutionally perfect imaginative faculty receives information from both dominant and weak heavenly bodies. By ‘weak’, Gersonides means that certain celestial bodies are too weak both to bring about events on earth as well as to transmit information about these events. Hence he concludes that information about the future emanates “from the dominant body in the particular proper face (panim) in which it has dominance but not from any of the attending planets (ha-meshartim)” (Wars, II.7, pp. 69–70). But to constitutionally imperfect imaginative faculties, the information received is only from the dominant heavenly bodies. Hence the overall quality of the information received will differ in the two cases. More specifically, because of the difficulty of obtaining the necessary positions of these bodies by observation, astrologers are often unable to verify their data. Furthermore, since the zodiacal position of a heavenly body at any given time is only repeated once in many thousands of years, astrologers have no access to the repeatability of those events that would be required to verify their knowledge. Furthermore, humans simply do not have sufficient knowledge about the heavenly bodies.