οὐδὲν ἀπολείπω προθυμίας

From LSJ

Πολλὰ τὰ δεινὰ κοὐδὲν ἀνθρώπου δεινότερον πέλει → There are many wondrous things in this world, but none more wondrous than humans

Sophocles, Antigone, 332-3

Greek > English (Woodhouse)

not to let one's zeal cool