Plato, Epinomis 985b

καὶ συμπλήρους δὴ ζῴων οὐρανοῦ γεγονότος, ἑρμηνεύεσθαι πρὸς ἀλλήλους τε καὶ τοὺς ἀκροτάτους θεοὺς πάντας τε καὶ πάντα, διὰ τὸ φέρεσθαι τὰ μέσα τῶν ζῴων ἐπί τε γῆν καὶ ἐπὶ τὸν ὅλον οὐρανὸν ἐλαφρᾷ φερόμενα ῥύμῃ. τὸ δὲ ὕδατος πέμπτον ὂν ἡμίθεον μὲν ἀπεικάσειεν ἄν τις ὀρθῶς ἀπεικάζων ἐξ αὐτοῦ γεγονέναι, καὶ τοῦτʼ εἶναι τοτὲ μὲν ὁρώμενον, ἄλλοτε δὲ ἀποκρυφθὲν ἄδηλον γιγνόμενον, θαῦμα κατʼ ἀμυδρὰν ὄψιν

they interpret all men and all things both to one another and to the most exalted gods, because the middle creatures move both to earth and to the whole of heaven with a lightly rushing motion. The kind which is of water, the fifth, we shall be right in representing as a semi-divine product of that element, and it is at one time seen, but at another is concealed through becoming obscure, presenting a marvel in the dimness of vision. So these