Book 1: Chapter 23, Aristotle's Physics Summary and Analysis

Aristotle included his scientific views in the book called "Physics" and "On the Heavens" that influenced science until Galileo. Theories expressed in this book led to the formation of words, such as 'quintessence' and 'sublunary'. The philosophy historian needs to study them even though they were disproved by modern science.

Philosophers have formal systems and other systems of which they are unaware. They try to prove their hidden theories through more sophisticated theories, leading to conclusions that something may be true.

Greeks regarded as important the movement of animals and the movement of heavenly bodies. Today, the animal body is complicated and different from machines while Greeks assigned certain motions to animal motions. Heavenly bodies differed from animals because of their regular movements while sun and moon were to be gods. Such notion implied that...