ἄνθρωπος ὢν ἥμαρτον· οὐ θαυμαστέον → being human I made a mistake; there is nothing remarkable about it
dor. c. ἐξαπίνης.
ἐξᾰπῐνας 1 of a sudden ἐξαπίνας εἰ μὴ θεὸς ἁγεμόνεσσι κυβερνατὴρ γένηται (P. 4.273)