All things are in motion, and nothing is at rest. … You cannot step into the same [river] twice, for fresh waters are ever flowing in upon you.

[Πάντα ῥεῖ καὶ οὐδὲν μένει]

Heraclitus of Ephesus (c.540-c.480 BC) Greek philosopher [Ἡράκλειτος, Herákleitos, Heracleitus]

(Attributed)

Paraphrased by Socrates in Plato, Cratylus, l. 402 [tr. B Jowett (1894)] and by Diogenes Laërtius in Lives of the Philosophers Bk 9, sec 8

Alt trans.:

• Everything flows, nothing stays still
• Everything flows and nothing stays.
• Everything flows and nothing abides.
• Everything gives way and nothing stays fixed.
• Everything flows; nothing remains.
• All is flux, nothing is stationary.
• All is flux, nothing stays still.

• You cannot step twice into the same river; for other waters are continually flowing in.
• You cannot step twice into the same stream. For as you are stepping in, other waters are ever flowing on to you.
• You cannot step twice into the same river.
• It is impossible to step into the same river twice.
• No man ever steps in the same river twice, for it's not the same river and he's not the same man.