Οἱονεὶ κωλύεται κατηγορήσας, ὡς βούλεται, ἀπολογεῖσθαι τοὺς δυναμένους ὡς πέφυκεν ἔχειν τὰ πράγματα. We have taken κωλύεται as middle. Some propose κωλύει. And we have read βούλονται, a lection which is given by a second hand in one MS.