The thesis of this paper is that, in De Caelo I.2, the introduction and differentiation of simple bodies is achieved entirely by differentiating simple motions. This runs counter to the traditional interpretations of De Caelo I.2, which consider how, and how completely, Aristotle uses the differentiation of simple magnitudes to differentiate simple bodies, and which assume that he introduces the notion of a simple body independently of the notion of a simple motion. But the traditional interpretations miss the point of Aristotle’s argument in De Caelo I.2, which – so I argue – is to introduce the notion of simple motions, using this to introduce the notion of simple bodies, and to thereby provide an explanatory account of all possible locomotion. This is the reason why Aristotle identifies simple bodies in De Caelo I.2 with the fundamental components of the universe.

本文的论点是，在De Caelo I.2中，简单体的引入和微分完全是通过简单运动的微分来实现的。这与 De Caelo I.2 的传统解释背道而驰，该解释考虑了亚里士多德如何以及如何完整地使用简单量的微分来区分简单物体，并假设他独立于概念引入了简单物体的概念一个简单的动作。但传统的解释忽略了亚里士多德在 De Caelo I.2 中论证的要点，我认为，该论证是引入简单运动的概念，用它来引入简单物体的概念，从而提供简单运动的解释性说明。所有可能的运动。这就是亚里士多德将 De Caelo I.2 中的简单物体等同于宇宙基本组成部分的原因。