School of thought

Heracliteanism

Intellectual current

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Classification

Period
c. 500-400 BCE
Regions
Europe (origin)
Domains
Metaphysics, Philosophy of Nature

Overview

Heraclitus of Ephesus taught that everything is in constant flux. The saying he is best known for — that you cannot step into the same river twice — is Plato's summary rather than a surviving fragment, and some scholars think it overstates him; what the fragments say is that different waters flow upon those who step into the same rivers. Yet this ceaseless change is governed by the Logos, a rational principle that orders the cosmos. Reality is constituted by the dynamic tension of opposites: day and night, life and death, war and peace are aspects of a single underlying unity.

Key ideas

  • Universal Flux: All things are in perpetual change. The world is a process rather than a collection of fixed objects, and what looks like a stable thing is a pattern held steady within that change.
  • Logos: A rational principle governing all change — the hidden harmony behind the apparent chaos. Most people fail to perceive it, living as if asleep.
  • Unity of Opposites: Opposites are interdependent: 'The road up and the road down are one and the same.' Conflict and tension are not defects but the very structure of reality.

Key figures

Heraclitus

Positions held

Influenced by

Later connections

  • Stoicism Influenced by this tradition
  • Platonism Incorporated this tradition into a synthesis

    Plato assigned Heraclitus's ceaseless flux to the world of the senses: because particulars never stay the same, they cannot be what knowledge is about.

References

  • Stanford Encyclopedia of Philosophy, Heraclitus
  • Stanford Encyclopedia of Philosophy, Heraclitus, introduction and §1 — Formation: Heraclitus was active around 500 BCE at Ephesus, a Greek city of Ionia, where he reportedly deposited his book.
  • Heraclitus, DK B12 and B30 (in Kirk, Raven and Schofield, The Presocratic Philosophers, 2nd ed., 1983)
  • G. S. Kirk, J. E. Raven and M. Schofield, The Presocratic Philosophers (2nd ed., Cambridge University Press, 1983), ch. 6 (Heraclitus of Ephesus)
  • Fragments — Heraclitus (trans. Brooks Haxton)
  • The Art and Thought of Heraclitus — Charles H. Kahn