H
Heraclitus
Heraclitus
c. 540 BCE–c. 480 BCE · Ephesus
Heraclitus of Ephesus (c. 540 – c. 480 BCE) was a Pre-Socratic Greek philosopher active in the Ionian city of Ephesus. He is known chiefly through surviving fragments and later testimonia, written in a deliberately dense, aphoristic style that earned him the ancient epithet "the Obscure." His thought centers on perpetual change and flux, captured in his river saying, “upon those who step into the same rivers, other and other waters flow” (fragment B12), which Plato later paraphrased as “you cannot step into the same river twice,” and on the logos as an underlying ordering principle governing a cosmos he identified with ever-living fire. He also held that opposites are unified and interdependent, a doctrine that influenced later Stoic physics and remained a touchstone for ancient and modern philosophy.
“Upon those who step into the same rivers, different and ever different waters flow.”
Did you know?
The man who said “you cannot step in the same river twice” lived alongside Confucius
Heraclitus of Ephesus, who taught that everything is in flux and that “you cannot step into the same river twice,” was a contemporary of Confucius far to the east. Their lifetimes overlapped for roughly sixty years.
How we know
Heraclitus c. 540–480 BCE; Confucius 551–479 BCE. Overlap 540–480 BCE = 60 years.
Life journeyclick any stop, or use ←/→
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Stop 1 of 1Lived
EphesusIonia (Asia Minor)
What they did here
Lived at Ephesus, where he belonged to a leading family (Diogenes Laertius 9.1, 9.6).
About Ephesus
Ephesus was an ancient Greek city on the Ionian coast, near modern Selçuk in western Turkey, famed for the nearby Temple of Artemis, one of the Seven Wonders of the Ancient World. A member of the Ionian League and home of the philosopher Heraclitus, it came under Roman control in 129 BCE. According to the Acts of the Apostles, Paul spent about three years there, first teaching in the city's synagogue; Ephesus received one of the Pauline letters, is among the seven churches addressed in the Book of Revelation, and may be where the Gospel of John was written. It hosted Christian councils in the 5th century, among them the Council of Ephesus in 431.
In Ephesus at the same time
In the same place & time
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Sages whose lives overlapped with Heraclitus’s in the same cities, drawn from their recorded journeys.
In the same tradition
The world in their lifetime
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Thinkers and teachers of other traditions whose lives overlapped with Heraclitus’s — a glimpse of the wider world they lived in. Drawn purely from recorded birth and death years.