Ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλος → Life is not worth living if you do not have at least one friend.
ex-clāro: āre, v. a.,
I to light up, illumine (opp. obscurare), Vitr. 1, 2, 7.
exclārō, āre, tr., éclairer : Vitr. Arch. 1, 2, 7.
ex-clāro, āre, erhellen (Ggstz. obscurare), Vitr. 1, 2, 7.