When the Rambam [in the introduction to the Guide] identifies the Work of Creation [Genesis chapter 1] mentioned in the Gemara with Physics and the Divine Chariot [Ezekiel chapter 1]with Metaphysics as understood by the ancient Greeks --that took a certain amount of courage. Even though this was an ancient approach that began with Saadia Gaon and the Obligations of the Hearts still it does not sound like how the sages of the Talmud think of the ancient Greeks. [Most of the time in the Talmud you get the idea that they did not like the ancient Greeks very much..And the few places where the Work of Creation and the Divine Chariot are mentioned, the Talmud does not describe them as being what in Attic Greece were the subjects of Physics and Metaphysics. Still I eventually had to depend on this opinion of the Rambam. [but no before i saw this same approach brought in the obligations of the hearts. ] [For some reason I have not been able to understand, I never ''made it'' in the Litvak yeshiva world which I really loved--but they did not love me. So from lack of choices, I went to university to major in Physics]
When the Rambam mentions Physics, he includes Chemistry as you can see in the first four chapters of the Yad Hachazah [Mishne Torah.] When he mentions metaphysics, he is mainly referring to the set of books of Aristotle by that name;- but not that alo ne. He clearly includes Plotinus--as has been noted before that he is not solely going with Aristotle, but rather the synthesis the Plotinus created between Aristotle and Plato. [Nowadays I would include Kant and Leonard Nelson's approach to Kant. see the web site of Kelley Ross]. That is not the only approach to Kant but it makes a lot more sense to me than the other one's of sensibility first or reason first. See Robert Hanna and Sperber. [I mean that there were critiques on Kant by Schulze, and Maimon and some others. Because of that set of questions, there arose three approaches to Kant --1. reason first, 2. sensibility first, and 3. neither of the above but rather a kind of knowledge that precedes both reason and sensibility--nonintuitive immediate knowledge ]
