An examination of the remarkable penetrating mind of Moses Maimonides and to his rational eye-opening thoughts on many subjects. It includes ideas that are not incorporated in the usual books about this great philosopher because they are so different than the traditional thinking of the vast majority of people. It contrasts the notions of other Jewish thinkers, somewhat rational and others not rational at all. The reader will be surprised, if not shocked, to learn that a host of beliefs that are prevalent among the Jewish masses have no rational basis. This does not suggest that Judaism itself is irrational and absurd. Just the opposite. But many Jews have opted to believe the unreasonable and illogical conventional ideas what Maimonides would label non-Jewish sabian notions because they have not been acquainted with Maimonides correct rational alternatives and taken the time to reflect upon it.