I have found (it)!
Von Archimedes, Greek scholar (287-212 BC)
"Eureka" comes from the Ancient Greek, which he said after he had stepped into a bath and noticed that the water level rose, whereupon he suddenly understood that the volume of water displaced must be equal to the volume of the part of his body he had submerged.
Αγάλι αγάλι γίνεται η αγουρίδα μέλι.
Slowly, slowly the sour grape becomes honey.
Von Unknown, Greek proverb
All things require a great deal of time to mature, be they people or situations. Patience is a virtue.