through the hypocrisy of men who speak lies, branded in their own conscience as with a hot iron;
Having their conscience seared with a hot iron - The allusion here is doubtless to the effect of applying a hot iron to the skin. The cauterized part becomes rigid and hard, and is dead to sensibility. So with the conscience of those referred to. It has the same relation to a conscience that is sensitive and quick in its decisions, that a cauterized part of the body has to a thin, delicate, and sensitive skin. Such a conscience exists in a mind that will practice delusion without concern; that will carry on a vast system of fraud without wincing; that will incarcerate, scourge, or burn the innocent without compassion; and that will practice gross enormities, and indulge in sensual gratifications under the mask of piety. While there are many eminent exceptions to an application of this to the Papal communion, yet this description will apply better to the Roman priesthood in the time of Luther - and in many other periods of the world - than to any other “body of men” that ever lived.