Book I, Natural Magic, of Heinrich Cornelius Agrippa's De Occulta Philosophia, with the public boundary stated plainly.
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Book I — Natural Magic — Heinrich Cornelius Agrippa's De Occulta Philosophia (1533), Book I — Natural Magic — translated from the first published Latin edition. The foundation document of Renaissance ceremonial magic, placing occult philosophy within the unified framework of physics, mathematics, and theology.