When Saadia Gaon, Ibn Pakuda Rambam emphasized Physics and Metaphysics, they also makes it very clear exactly what they means. That is as these subjects were understood in Athens and Sparta. On the other hand, this does not mean to deny the importance that Rav Isaac Luria brings to understanding the Torah. In fact for me personally the only way I can understand the Torah even in the most simple way is through Rav Isaac Luria. But I do not talk about that much because the whole business really got absorbed into the Sitra Achra [the Dark Side.]