His aphorisms are well known, and used to be frequently quoted during the Middle Ages and afterwards, and some of them deserve to be remembered even at the present time. For instance, he said: "Where the veins and arteries are notably large, incision and deep cauterization should be avoided." "When cauterization is to be done the direct cautery should be used; caustic applications are only suitable for very timid patients." "The lips of a wound will glue together of themselves if there is no foreign substance between them, and in this way the natural appearance of the part will be preserved." "In large wounds sutures should be used, and silk thread tied at short distances makes the best sutures." "The infection of the dura mater is followed in most cases by death." "A collection of pus is best dissolved by incision and cleaning out of the purulent material." "To put off the opening of an abscess brings many dangers with it." "In most cases of scrofula external applications are better than the use of the knife. Scrofulous patients always have other sources of infection within them, and so it does them no good to operate externally." "Tranquil and pure air is the best friend for convalescents." Villanova advised that the bite of a mad dog should not be permitted to heal at once, but the wound should be enlarged and allowed to bleed freely, leeches and cups being used to encourage bleeding, and healing should not be permitted for forty days. He believed very thoroughly in drainage, and in the dilation of narrow fistulous openings. He describes anthrax or carbuncle, and has chapters on various painful conditions for which he employs the terms arthritis, sciatica, chiragra, podagra, and gonagra. Villanova's treatment of the subject of hernia shows how thoroughly conservative he was, and how careful were his observations. In young persons in recent hernias he advised immediate complete reposition of the contents of the sac, the bringing together of the hernial opening by means of adhesive plaster, above which a bandage was placed, and the patient should be put to bed with the feet and legs elevated and the head depressed for ten to fifteen days or more if necessary. He says that "there are some--especially surgeons--who claim that they can cure hernia by incision, and some others by means of a purse-string ligature, and still others by the cautery or by some cauterizing material [they manifestly had our complete catalogue of 'fakes' in the matter]; but I prefer not to mention these procedures, since I have seen many patients perish under them, and others brought into serious danger of death, and I do not think that the surgeon will acquire glory or an increase of his friends from such perilous procedures, and I do not approve their use."