that is to say, the facts of history and the facts of nature, taken in and by themselves and in their widest sense. Here it is the thing treated of, which gives its peculiar character to the book; so that a book can be important, whoever it was that wrote it.
But in regard to the form, the peculiar character of a book depends upon the person who wrote it. It may treat of matters which are accessible to everyone and well known; but it is the way in which they are treated, what it is that is thought about them, that gives the book its value; and this comes from its author. If, then, from this point of view a book is excellent and beyond comparison, so is its author. It follows that if a writer is worth reading, his merit rises just in proportion as he owes little to his matter; therefore, the better known and the more hackneyed this is, the greater he will be. The three great tragedians of Greece, for example, all worked at the same subject-matter.
So when a book is celebrated, care should be taken to note whether it is so on account of its matter or its form; and a distinction should be made accordingly.
Books of great importance on account of their matter may proceed from very ordinary and shallow people, by the fact that they alone have had access to this matter; books, for instance, which describe journeys in distant lands, rare natural phenomena, or experiments; or historical occurrences of which the writers were witnesses, or in connection with which they have spent much time and trouble in the research and special study of original documents.
