I am in search of a direct quote (as close as possible) from Heraclitus that expresses the idea that life is flux -or- everything changes. With the help of this website I have been told that Heraclitus has many quotes from people talking about him and his ideas, but very few quotes that are directly his. Ultimately I am looking for the quote to be translated into the correct (Koine or Attic) Greek.
One of the better-known and less-reliable sources of Heraclitus quotes is Plato's Cratylus, which is also a wonderfully amusing source of completely wrong etymologies. However, it's not clear if this part (402a) is meant to be a direct quote or a paraphrase:
Σ: Τὸν Ἡράκλειτόν μοι δοκῶ καθορᾶν παλαί' ἄττα σοφὰ λέγοντα, ἀτεχνῶς τὰ ἐπὶ Κρόνου καὶ Ῥέας, ἃ καὶ Ὅμηρος ἔλεγεν.
Ε: Πῶς τοῦτο λέγεις;
Σ: Λέγει που Ἡράκλειτος ὅτι πάντα χωρεῖ καὶ οὐδὲν μένει, καὶ ποταμοῦ ῥοῇ ἀπεικάζων τὰ ὄντα λέγει ὡς δὶς ἐς τὸν αὐτὸν ποταμὸν οὐκ ἂν ἐμβαίης.
S: I seem to remember Heraclitus saying some ancient wisdom, old as Cronus and Rhea, that Homer said too…
H: What does that mean?
S: See, Heraclitus says that everything is in motion and nothing stays fixed, and, comparing the universe to the flow of a river, he says that you cannot step into the same river twice.
Ancient Greek didn't have quotation marks, so Socrates could be quoting Heraclitus directly, or could be paraphrasing his teachings; the Greek would look the same either way. (I could just as well have translated that "Heraclitus says: 'everything flows…'").
The most famous version is simply:
This version comes from Simplicius, in his commentary on Aristotle's Physica (1313.11). But again it's not clear if he's quoting or paraphrasing.
Maybe more accurately, here's a quote preserved via Cleanthes, via Arius Didymus, via Eusebius. This one is commonly claimed to be a direct quote, though I'm not sure what evidence there is for that:
ποταμοῖσι τοῖσιν αὐτοῖσιν ἐμβαίνουσιν ἕτερα καὶ ἕτερα ὕδατα ἐπιρρεῖ
Ever-different water flows over those who step in the same river.
And finally, this almost certainly isn't what you want, but Seneca makes a direct quote (translated into Latin), in his Moral Letters (58.23):
Hoc est quod ait Heraclitus: in idem flumen bis descendimus et non discendimus. manet enim idem fluminis nomen, aqua transmissa est.
This is what Heraclitus says: we both do and do not step twice into the same river. Because, you see, the name of the river stays the same, but the water keeps flowing.
(All translations mine; all Latin and Greek from the Loeb Classical Library.)