For when they speak great swelling words of vanity, they allure through the lusts of the flesh, through much wantonness, those that were clean escaped from them who live in error. They speak great swelling words of vanity - The word ὑπερογκα signifies things of great magnitude, grand, superb, sublime; it sometimes signifies inflated, tumid, bombastic. These false teachers spoke of great and high things, and no doubt promised their disciples the greatest privileges, as they themselves pretended to a high degree of illumination; but they were all false and vain, though they tickled the fancy and excited the desires of the flesh; and indeed this appears to have been their object. And hence some think that the impure sect of the Nicolaitans is meant. See the preface.
Those that were clean escaped - Those who, through hearing the doctrines of the Gospel, had been converted, were perverted by those false teachers.