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
P. παραβολή, ἡ.
in comparison with: use prep., P. and V. πρός (acc.).
