428d

καὶ πειρᾶσθαι, τὸ ἐκείνου τοῦ ποιητοῦ, βλέπειν ‘ἅμα πρόσσω καὶ ὀπίσσω. How did this contruction originate? Is it kind of loose Acc, something similar to Acc Absolute in to legomenen?