L’ἀλήθεια dell’‘essere’ nel cielo del proemio parmenideo (28, B1 D.-K.)

The dóxa is a major aspect of Parmenides’ “scientific” commitment, as evidenced by studies of its discoveries in various fields of knowledge. Among them in astronomy. However, these studies have ended up identifying a scientific plan separate from the mythicalreligious and philosophical one of the first part. This survey explores the possibility of reconsidering the presence in the Parmenides’ dóxa of ontology and theology. It does so by proposing the hypothesis that the proem contains among the multiple semantic-linguistic layers the mythopoeic presentation of the astronomical theorem of the identity of Eos and Hesperus, with the intent of showing, from the very beginning and in the most authoritative language for his audience, the alḗtheia of «being» on the divine stage of the celestial sphere. In our reading, therefore, the deities that enter the scene give life to a firmament that interconnects every cosmic dimension with each other and leads the one who knows (the εἰδότα φῶτα; B1, 3) – he knows that πᾶν πλέον ἐστὶν ὁμοῦ φάεος καὶ νυκτὸς because ἐπεὶ οὐδετέρωι μέτα μηδέν (B9, 3-4) – on the other side of the sky, in the presence of the theá that will reveal to him the meaning of everything.