ἀγαθοὶ δὲ ἐγένοντο διὰ τὸ φῦναι ἐξ ἀγαθῶν → they were virtuous because they were sprung from virtuous men, virtuous they were because they were sprung from men of virtue
Σπαρτός: ὁ1) «посеянный» (т. е. выросший из посеянных Кадмом зубов дракона);2) поэт. фиванец Pind.: Σπαρτῶν στάχυς Eur. всходы посеянных (Кадмом), род фиванцев.