οὐρανοῦ ἀναπτυχαί

From LSJ

κρεῖττον εἶναι φιλοσόφως ἀποθανεῖν ἢ ἀφιλοσόφως ζῆν → that it is better to die in manner befitting a philosopher than to live unphilosophically

Source

Greek > English (Woodhouse)

the vault of heaven