Physics

Key Concepts and Strategies

In «Physics», Aristotle presents key concepts concerning nature and motion. He views nature as a collection of entities possessing an internal principle of motion and rest. Aristotle introduces the concept of four causes: material, formal, efficient, and final, which explain existence and change in the world. He also discusses the concept of infinity, asserting that it exists potentially but not actually. A significant theme is motion, which Aristotle categorizes into changes in quality, quantity, place, and essence. He introduces the concept of the 'prime mover', which is an unmoved and eternal source of motion. Aristotle also analyzes time as the number of motion in relation to before and after, linking it to change and motion. The book discusses the principles of continuity and discreteness, as well as the nature of the void, which Aristotle denies, asserting that a void cannot exist as it contradicts the nature of motion.