If we read a book which contains incredible or impossible narratives, or is written in a very obscure style, and if we know nothing of its author, nor of the time or occasion of its being written, we shall vainly endeavor to gain any certain knowledge of its true meaning. For being in ignorance on these points we cannot possibly know the aim or intended aim of the author; if we are fully informed, we so order our thoughts as not to be in any way prejudiced either in ascribing to the author or him for whom the author wrote either more or less than his meaning, and we only take into consideration what the author may have had in his mind, or what the time and occasion demanded. I think this must be tolerably evident to all. It often happens that in different books we read histories in themselves similar, but which we judge very differently, according to the opinions we have formed of the authors. I remember once to have read in some book that a man named Orlando Furioso used to drive a kind of winged monster through the air, fly over any countries he liked, kill unaided vast numbers of men and giants, and such like fancies, which from the point of view of reason are obviously absurd. A very similar story I read in Ovid of Perseus, and also in the books of Judges and Kings of Samson, who alone and unarmed killed thousands of men, and of Elijah, who flew through the air, and at last went up to heaven in a chariot of fire, with horses of fire. All these stories are obviously alike, but we judge them very differently. The first only sought to amuse, the second had a political object, the third a religious object. We gather this simply from the opinions we had previously formed of the authors. Thus it is evidently necessary to know something of the authors of writings which are obscure or unintelligible, if we would interpret their meaning; and for the same reason, in order to choose the proper reading from among a great variety, we ought to have information as to the versions in which the differences are found, and as to the possibility of other readings having been discovered by persons of greater authority....