On a wall near S. Lopez and a fluctuating canal, beside a rather crass statement asserting "Life is hard, p-ssy is soft" someone* made reference to a philosopher from war-torn Ephesus:
Time is a child playing a game of draughts. The kingship is in the hands of the child. -- Heraclitus
This was written in pencil, and has probably washed away now.
--- * Unlike the other time, it's possible that in this case "someone" is oyster himself