Abstract

At the beginning of the Book 1 of the Physica, Aristotle sets the question on the matter and subject of natural science. This issue refers to the concept of the science, which he starts bringing up. Natural Science (philosophia naturalis) has, since then, been especially enquired into, above all in terms of the original Aristotle’s commentary. Averroes dedicates a concise and, at the same time comprehensive Proem on the subject. Thomas Aquinas, on the contrary, and in opposition to other cases, omits a methodological proem, although the subject itself develops on the brim of the commentaries on the text of Book 1. The aim of this work is to analyze the approximation and differences between the Lesson 1 of the Commentaries to the Book 1 of the Aquinate (where the philosophia naturalis method is dealt with) and the exegesis of Averroes in his Proem and the Summa Prima, in order to establish the relationship between both. KEY WORDS – Aristotle. Thomas Aquinas. Averroes. Natural science. Physical methodology