Nothing endures but change.
Heraclitus of Ephesus (c.540-c.480 BC) Greek philosopher [Ἡράκλειτος, Herákleitos, Heracleitus]
In Diogenes Laertes, Lives of Eminent Philosophers, 9.8 [tr. R Hicks (1925)]
Alt trans.: There is nothing permanent except change. The only constant is change. Change is the only constant. Change alone is unchanging.