If the hurtfulness of the design, if the malevolence of the affection, were alone the causes which excited our resentment, we should feel all the furies of that passion against any person in whose breast we suspected or believed such designs or affections were harboured, though they had never broke out into any action. Sentiments, thoughts, intentions, would become the objects of punishment; and if the indignation of mankind run as high against them as against actions; if the baseness of the thought which had given birth to no action, seemed in the eyes of the world as much to call aloud for vengeance as the baseness of the action, every court of judicature would become a real inquisition.... Actions, therefore, which either produce actual evil, or attempt to produce it, and thereby put us in the immediate fear of it, are by the Author of nature rendered the only proper and approved objects of human punishment and resentment. Sentiments, designs, affections, though it is from these that according to cool reason human actions derive their whole merit or demerit, are placed by the great Judge of hearts beyond the limits of every human jurisdiction, and are reserved for the cognizance of his own unerring tribunal.
Adam Smith, Theory of Moral Sentiments, II.iii.25
