Fragments
What survives of Heraclitus
Heraclitus wrote one book and it is lost. These 14 lines reached us only because other writers copied them into works of their own, usually while arguing about something else.
This account holds forever, but men fail to comprehend it, both before hearing it and once they have heard.
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Sextus Empiricus, Against the Logicians VII.132 (c. 200 CE)
A sceptic surveying what earlier thinkers had claimed about the criterion of truth. He copied out the opening of the book as evidence in an argument that no such criterion exists.
Upon those who step into the same rivers, different and again different waters flow.
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Arius Didymus, quoted in turn by Eusebius, Preparation for the Gospel XV.20.2 (c. 315 CE)
Arius Didymus was compiling opinions about the soul; three centuries later Eusebius quoted that compilation while arguing that Greek philosophy pointed beyond itself. The line reaches us at two removes.
It is not possible to step twice into the same river.
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Plutarch, On the E at Delphi 392b (c. 100 CE)
Plutarch was writing about the letter E carved at Delphi and turned to Heraclitus to argue that mortal things never hold still long enough to be said to exist.
War is the father of all and the king of all: some it reveals as gods, others as men; some it makes slaves, others free.
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Hippolytus of Rome, Refutation of All Heresies IX.9.4 (c. 222 CE)
Hippolytus was trying to destroy the reputation of a heretic named Noetus by showing his theology had been lifted from a pagan Greek. To make the charge stick he quoted Heraclitus at length and accurately.
The hidden harmony is stronger than the visible one.
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Hippolytus of Rome, Refutation of All Heresies IX.9.5 (c. 222 CE)
Quoted in the same attack on Noetus, a line later in the same passage.
The way up and the way down are one and the same.
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Hippolytus of Rome, Refutation of All Heresies IX.10.4 (c. 222 CE)
Cited as evidence that Heraclitus held opposites to be identical, which was exactly the doctrine Hippolytus wanted to pin on his heretic.
Immortals are mortal, mortals immortal: each lives the other's death and dies the other's life.
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Hippolytus of Rome, Refutation of All Heresies IX.10.6 (c. 222 CE)
Produced as the clearest proof of the identity of opposites, and so the most damning parallel to the heresy under attack.
The lord whose oracle is at Delphi neither speaks nor conceals, but gives a sign.
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Plutarch, On the Oracles at Delphi 404d (c. 100 CE)
Plutarch was a priest at Delphi, arguing about why the god had stopped answering in verse. He reached for a line written six centuries earlier about how that god communicates at all.
I searched myself.
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Plutarch, Against Colotes 1118c (c. 100 CE)
Quoted while defending earlier philosophers against an Epicurean who had mocked them, as proof that enquiry could begin from the self.
A man's character is his guiding spirit.
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Stobaeus, Anthology IV.40.23 (c. 450 CE)
Stobaeus was assembling an anthology of instructive passages for the education of his son. The line survives because it looked useful to a father.
Nature loves to hide.
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Themistius, Orations 5.69b (c. 360 CE)
A court orator used it in a speech, nine centuries after it was written, as a compact way of saying that truth does not present itself.
Much learning does not teach understanding.
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Diogenes Laertius, Lives of the Eminent Philosophers IX.1 (c. 230 CE)
A biographer needed a line to establish his subject's famous contempt for other people's erudition, and quoted the insult itself.
This world-order, the same for all, no god and no man made; it always was and is and will be: an ever-living fire, kindling in measures and going out in measures.
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Clement of Alexandria, Miscellanies V.104.1 (c. 200 CE)
Clement was arguing that Greek thinkers had glimpsed in fragments what scripture set out whole. To show the glimpse he had to reproduce it.
You would not find the limits of the soul by travelling, even if you walked every road: so deep is its measure.
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Diogenes Laertius, Lives of the Eminent Philosophers IX.7 (c. 230 CE)
Included in the biographical sketch as a specimen of the obscurity that earned him the nickname the Riddler.