ποταμῷ γὰρ οὐκ ἔστιν ἐμβῆναι δὶς τῷ αὐτῷ → it is impossible to step twice in the same river, you cannot step twice into the same rivers
δίσχιστος: -ον, εἰς δύο ἐσχισμένος, Γρηγ. Ναζιανζ. 2, 16D.
