75. It may be asked whether the Angel spoke the precise truth regarding the virtue of those things, or whether he might have lied; and likewise, whether the whiteness was withdrawn from the eyes of the elder Tobit by the native force of the gall of the fish, or by the supernatural virtue of the Angel Raphael? To say that the Angel could have lied would be an heretical blasphemy; he therefore spoke the precise truth; but it would no longer be so if all kinds of Demons were not expelled by the smoke of the liver of the fish, unless aided by the supernatural force of the Angel, and especially, if such aid was the principal cause of the effect produced, as the Doctors assert in the present case. It would doubtless be a lie if a physician should say: such an herb radically cures pleurisy or epilepsy, and if it should only begin the cure, the completion of which required the addition of another herb to the one first used; in the same manner, Raphael would have lied when averring that the smoke of the liver expelled all kinds of demons, so that they should not return, if that result had been only begun by the smoke, and its completion had been principally due to the virtue of the Angel. Besides, that flight of the demon was either to take place universally and by any one whomsoever putting the liver of the fish on the coals, or else it was only to occur in that particular case, the younger Tobit putting the liver on. In the first hypothesis, any person making that smoke by burning the liver should be assisted by an Angel, who, through his supernatural virtue should expel the Demons miraculously and regularly at the same time; which is absurd; for, either words have no meaning, or a natural fact cannot be regularly followed by a miracle; and, if the Demon was not put to flight without the assistance of the Angel, Raphael would have lied when ascribing that virtue to the liver. If, on the contrary, that effect was only to be brought about in that particular case, Raphael would again have lied when assigning to that fish, universally and absolutely, the virtue of expelling the Demon: now, to say that the Angel lied is not possible.