Combining Texts

You have chosen 'works' by Søren Kierkegaard, 'On Nature Itself (De Ipsa Natura)' by Gottfried Leibniz and 'New System and Explanation of New System' by Gottfried Leibniz

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All the ideas for Natural Reality, or select a subheading:
      A. Classical Physics
      B. Modern Physics
      C. Space
      D. Time
      E. Cosmology
      F. Chemistry
      G. Biology