Metaphysics
- Aristotle, Metaphysics, Book I, 987a13-19: "The Pythagoreans, while they likewise spoke of two principles, made this further addition, which is..."
- Aristotle, Metaphysics, Book XIV, 1090a20-5: "The Pythagoreans, on the other hand, observing that many attributes of numbers apply to sensible..."
- Gottfried Leibniz, Double Infinity In Pascal And Monad, Gr p555: "The basic almost-nothing, in coming up from nothing to things, since it is the simplest of..."
- Vitruvius, De Architectura, Book VII, Introduction, Paragraph 1: "Among the Seven Sages, Thales of Miletus pronounced for water as the primordial element in..."
- Upanishads, Chandogya, Verse 1.9.1: "Wherefrom do all these worlds come? They come from space [monad]. All beings arise from..."
- Robert Fludd, De Divinis Numeris, Vidi Jehovam in altissimo throno super palatium mundanum elevato sedentem…: [Visual Content]
Metaphysics is the branch of philosophy that deals with fundamental questions of what exists and what is real. Related disciplines are ontology (the nature of being for those things that exist) and epistemology (questions about how knowledge is acquired and categorized).