It seems that he had gone out of his way in his lectures to say something disrespectful of the doctors, his contemporaries, accusing them of ignorance of many things necessary to the successful practice of their profession, particularly of Astronomy, or more properly Astrology, a science in which Villeneuve plumed himself as being a master. The doctors naturally enough complained of such impropriety, and had him cited before their council. There he was told that something more of respectful bearing was due from him to men who had been his masters; and above all that he was transgressing the boundaries of true science and common sense in making so much of Astrology. The Dean of the Faculty is even said to have had him several times privately before him, and warned him of the difficulties he would inevitably fall into, if he continued casting nativities and prescribing for the ailments of his patients from the aspects of the stars; for this, it appears, was the principal element in his medical practice. Servetus, unhappily for himself, was not one of those who could take even friendly advice in good part. As credulous as he was sceptical, and believing implicitly in himself and in stellar influences, he not only made no submission, but said that his ill-wishers should rue their opposition. The doctors on their part not only gave no heed to his threats, but publicly denounced him from their chairs as an impostor and wind-bag; with the consequence of arousing him to self-defence, and with his ready pen setting him to work upon a pamphlet, in which he did not fail to lay bare some of the sore places in the persons of his adversaries, characterising them as mannerless and unlettered, and even holding them up in their ignorance as very pests of society. Once in the hands of the printer, Villeneuve’s purpose to expose his detractors through the dreaded press became known; and such alarm does his meditated attack appear to have excited that the Faculty of Physicians, calling the Senate of the University to their side, petitioned the Parliament of Paris to forbid the publication of the pamphlet, as well as to interdict its author from continuing to lecture on Astrology, which they now characterised as Divination.