Metaphysics

What if everything were made of one single thing?

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Thales of Miletus

Everything comes from water

Aristotle considered Thales the founder of the philosophy that asks what everything is made of. According to him, Thales said the principle of all things is water; Aristotle supposes he may have thought so because nourishment and seeds are moist.

ancient testimony · Aristóteles, Metaphysics 1.3 983b20

This idea opens onto 3 paths

Metaphysics · archē (first principle) · material monism

What is claimed and why

  1. Aristotle attributes to Thales the view that water is the principle (archē) of all things. ancient testimony
    Aristóteles, Metaphysics (tr. Hugh Tredennick) — 1.3 983b20
    Thales, the founder of this school of philosophy, says the permanent entity is water
    Aristóteles, Metaphysics (tr. Patricio de Azcárate) — I.3 983b
    Tales, fundador de esta filosofía, considera el agua como primer principio.
    Diógenes Laercio, Lives of Eminent Philosophers (tr. R. D. Hicks) — 1.27
    His doctrine was that water is the universal primary substance
    Patricia O'Grady, Thales of Miletus (Internet Encyclopedia of Philosophy) — §3 · consulted; copyrighted text, not reproduced
  2. Aristotle explains that, for most of the earliest philosophers, the material principle is that of which all things consist, from which they first come and into which they are resolved on their destruction, while its substance persists. ancient testimony
    Aristóteles, Metaphysics (tr. Hugh Tredennick) — 1.3 983b1
    That of which all things consist, from which they first come and into which on their destruction they are ultimately resolved
    Aristóteles, Metaphysics (tr. Patricio de Azcárate) — I.3 983b
    Aquello de donde salen todos los seres, de donde proviene todo lo que se produce, y adonde va a parar toda destrucción
    Patricia O'Grady, Thales of Miletus (Internet Encyclopedia of Philosophy) — §3 · consulted; copyrighted text, not reproduced
  3. Aristotle conjectures that Thales reached the idea of water by observing that the nourishment of all things is moist, that heat itself comes from moisture, and that seeds are moist by nature. ancient testimony
    Aristóteles, Metaphysics (tr. Hugh Tredennick) — 1.3 983b20
    Presumably he derived this assumption from seeing that the nutriment of everything is moist
    Aristóteles, Metaphysics (tr. Patricio de Azcárate) — I.3 983b
    se vio probablemente conducido a esta idea, porque observaba que la humedad alimenta todas las cosas
    Patricia O'Grady, Thales of Miletus (Internet Encyclopedia of Philosophy) — §5 · consulted; copyrighted text, not reproduced
  4. Aristotle calls Thales the founder of the kind of philosophy that sought the principles of things in matter. ancient testimony
    Aristóteles, Metaphysics (tr. Hugh Tredennick) — 1.3 983b20
    Thales, the founder of this school of philosophy
    Aristóteles, Metaphysics (tr. Patricio de Azcárate) — I.3 983b
    Tales, fundador de esta filosofía
    Patricia O'Grady, Thales of Miletus (Internet Encyclopedia of Philosophy) — §3 · consulted; copyrighted text, not reproduced

Profile: Thales of Miletus

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According to Aristotle, why might Thales have thought everything comes from water?

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