Philosophy Index


Heraclitus of Ephesus (c. 535–c. 475 BCE) was a pre-Socratic philosopher of ancient Greece. He is best known for his obscure writings, his depiction of a universe in flux, and using the term logos philosophically.


Heraclitus believed that change was a fundamental part to the universe. He says “On those stepping into rivers the same, other and other waters flow.” — the famous philosophical idea that one cannot step twice in the same river.

The image of the river, stream or flow is near-constant in Heraclitus' writings. He considers change to be all things to be in a constant state of change, moving back and forth between polar opposites. He considered things to come dually with their opposite, and that the path up and the path down were essentially the same.


Heraclitus was the first of the Greek philosophers to use the term logos, which means “word”, “account” or “plan”, as a technical one. Heraclitus seems to change back and forth between meanings of the word throughout his work.

Essentially, Heraclitus uses the term logos to describe a fundamental governance of the universe, a sort of universal principle. He says that the Logos is a common thing but that humans fail to notice or understand it.

Heraclitus is described as having been somewhat misanthropic, which is evident both in the pessimistic nature of his writings about the logos, and in discussion from others writing about him. He was sometimes known as “the weeping philosopher”, partly in contrast to Democritus, who was known as “the laughing philosopher”.


The British philosopher Bertrand Russell called Heraclitus “the first of the Fascists”[1] for his views on war. Russell refers to some passages from Heraclitus:

Homer was wrong in saying: "Would that strife might perish from among gods and humans!" He did not see that he was praying for the destruction of the universe; for, if his prayer were heard, all things would pass away.…

We must know that war is common to all and strife is justice, and that all things come into being through strife…

War is the father of all and the king of all; and some he has made gods and some humans, some bond and some free.[2]

In these and other passages, Heraclitus criticizes Homer for his pacificst attitude, arguing that how things came to be was through war, and thus war is good and necessary to our continuation. Russell likens Heraclitus’ stance to those of Nietzsche, the Nazis and to those who would use Darwinism and the survival-of-the-fittest explanation of how evolution takes place to argue that it is right to go to war in order to ensure that only the strongest survive.

  1. Russell, Bertrand. The Impact of Science on Society. London: George Allen & Unwin: 1976. p. 27 return
  2. Heraclitus. Fragments. return


Name: Ήρακλειτος (Heraclitus)
Born: c. 535 BCE
Died: c. 475 BCE