Heraclitus: Greek philosopher (late 6th/early 5th-century BC)

He was a native of Ephesus, Ionia, on the coast of Asia Minor.

Heraclitus
Heraclitus by Johannes Moreelse
Born	c. 535 BC Ephesus, Ionia, Persian Empire
Died	c. 475 BC (age c. 60)
Era	Ancient philosophy
Region	Western philosophy
School	Ionian
Main interests	Metaphysics, epistemology, ethics, politics, cosmology
Notable ideas	Logos, "everything flows", unity of opposites
Influences Anaximander, Pythagoras, Bias of Priene, Zoroaster, Homer
Influenced Parmenides, Plato, Aristotle, Socrates, Stoicism, Hegel, Engels, Nietzsche, Heidegger, Whitehead, Spengler, Popper, McKenna, Pater, D. H. Lawrence

His teaching, as we have it now, is a series of epigrams. This means his teachings are sayings and remarks, rather than systematic essays. Heraclitus is famous for his doctrine of change being central to the universe. His famous sayings, "All is flux", and "You cannot step twice into the same river" is still remembered today. Another of his sayings appeals to some psychologists:

• "You cannot discover the depths of the psyche, even if you travelled every road to do so, such is the depth of its meaning".

Often it is difficult to understand what he was trying to say. He believed in the unity of opposites, stating that "the path up and down are one and the same".

• "Good and bad are the same". In many of these 'opposite ends' pairs, if one never happened, then the other would be meaningless.

His utterance that "all things come to be in accordance with this logos," (literally, "word," "reason," or "account") has been the subject of many interpretations. Logos became a technical term in philosophy, beginning with Heraclitus, who used the term for a principle of order and knowledge.

Diogenes Laërtius states that Heraclitus' work was "a continuous treatise On Nature, but was divided into three discourses, one on the universe, another on politics, and a third on theology." Theophrastus says (in Diogenes) "... some parts of his work are half-finished, while other parts make a strange medley".

Diogenes also tells us that Heraclitus deposited his book as a dedication in the great temple of Artemis, the Artemisium, one of the largest temples of the 6th century BC, and one of the Seven Wonders of the Ancient World. Ancient temples were regularly used for storing treasures, and were open to private individuals under exceptional circumstances. Many later philosophers refer to the work.