"By malignant or vicious detraction, we sin against our neighbor's good name: by lying, sometimes even by casting a slur upon him, we injure him in his estate. It makes no difference whether you suppose that formal and judicial testimony is here intended, or the ordinary testimony which is given in private conversation. For we must always recur to the consideration, that for each kind of transgression one species is set forth by way of example, that to it the others may be referred, and that the species chiefly selected, is that in which the turpitude of the transgression is most apparent."