Combining Texts

You have chosen 'The Bhagavad Gita' by Anon (Bhag), 'Summa Contra Gentiles' by Thomas Aquinas and 'On the Ultimate Origination of Things' by Gottfried Leibniz

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All the ideas for Natural Theory, or select a subheading:
      A. Speculations on Nature
      B. Natural Kinds
      C. Causation
      D. Laws of Nature