I. Guiding Thoughts on the Method of Presentation

One can be of the opinion that these guiding lines correctly should have been placed at the end of the book because their truth follows only from the content of the complete presentation. They are, however, to precede the subject matter as a preliminary statement because they justify the inner structure of the book. For although they were the result of the author's research, they were naturally in his mind before he wrote the book and had their effect on its form. For the reader, however, it can be important to learn not only at the end of the book why the author presents his subject in a certain way, but to form his judgment concerning this method of presentation already during the reading. But only so much is to be stated here as is necessary for the understanding of the book's arrangement.