Speaking lies in hypocrisy. — The Greek words here should be translated, through the hypocrisy of men that speak lies. The lies that these men utter, refer to their teaching that it was pleasing to the eye of the All-seeing Creator for men and women to avoid certain meats, and to abstain from marriage. Their hypocrisy consisted in their assumption of a mask of holiness, which holiness they considered was derived from their false asceticism and their abstinence from things which the Apostle proceeded to show were lawful.
Having their conscience seared with a hot iron. — Better rendered, Branded in their own con-science as with a hot iron. The image is drawn from the practice of branding slaves and certain criminals on their forehead with a mark. “Qua nota turpitudinis non inusta tua vita est?” (Cic. Cat. i. 6.) These men tried to teach the efficacy of a substitution of certain counsels of perfection in place of a faithful loving life. They based their teaching on wild Oriental speculations about the evil nature of all matter. They were often themselves evil-livers, who, conscious of their own stained, scarred lives, strove with a show of outward sanctity and hypocritical self-denial to beguile and to lead astray others, and in the end to make them as vile as themselves.