When you consider nature itself, however, you see that it has neither awareness nor will. For instance, the nature of fire is to burn; it burns without consciousness or will. The nature of water is to flow; it flows without consciousness or will. The nature of the sun is to shed light; it shines without consciousness or will. The nature of vapour is to rise; it rises without consciousness or will. It is therefore evident that the natural movements of all created things are compelled, and that nothing moves of its own will save animals and, in particular, man (1:3)

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