Aelian, On the Nature of Animals 2.4
“Some animals are called Ephemera and they take their name from the length of their life. For they are born in wine and when the container is opened they fly out, they see the light, and they die. Therefore, nature has granted that they come into life but it has also rescued them from the evils in life, since they neither experience any suffering of their own and they know nothing of others’ misfortunes.”
Ζῷα ἐφήμερα οὕτω κέκληται, λαβόντα τὸ ὄνομα ἐκ τοῦ μέτρου τοῦ κατὰ τὸν βίον· τίκτεται γὰρ5ἐν τῷ οἴνῳ, καὶ ἀνοιχθέντος τοῦ σκεύους τὰ δὲ ἐξέπτη καὶ εἶδε τὸ φῶς καὶ τέθνηκεν. οὐκοῦν παρελθεῖν μὲν αὐτοῖς ἐς τὸν βίον ἔδωκεν ἡ φύσις, τῶν δὲ ἐν αὐτῷ κακῶν ἐρρύσατο τὴν ταχίστην, μήτε τι τῶν ἰδίων συμφορῶν ᾐσθημένοις μήτε μήν τινος τῶν ἀλλοτρίων μάρτυσι γεγενημένοις.
