§ 3. Theology of Egypt. Sources of our Knowledge concerning it. As regards the theology of the Egyptians and their system of ideas, we meet with difficulty from the law of secrecy which was their habit of mind. The Egyptian priesthood enveloped with mystery every opinion, just as they swathed the mummies, fold above fold, in preparing them for the tomb. The names and number of their gods we learn from the monuments. Their legends concerning them come to us through Plutarch, Herodotus, Diodorus, and other Greek writers. Their doctrine of a future life and future judgment is apparent in their ceremonies, the pictures on the tombs, and the papyrus Book of the Dead. But what these gods _mean_, what are their offices, how they stand related to each other and to mankind, what is the ethical bearing of the religion, it is not so easy to learn. Nevertheless, we may find a clew to a knowledge of this system, if in no other way, at least by ascertaining its central, ruling idea, and pursuing this into its details. The moment that we take this course, light will begin to dawn upon us. But before going further, let us briefly inquire into the sources of our knowledge of Egyptian mythology. The first and most important place is occupied by the monuments, which contain the names and tablets of the gods of the three orders. Then come the sacred books of the Egyptians, known to us by Clemens Alexandrinus. From him we learn that the Egyptians in his time had forty-two sacred books in five classes. The first class, containing songs or hymns in praise of the gods, were very old, dating perhaps from the time of Menes. The other books treated of morals, astronomy, hieroglyphics, geography, ceremonies, the deities, the education of priests, and medicine. Of these sacred Hermaic books, one is still extant, and perhaps it is as interesting as any of them. We have two copies of it, both on papyrus, one found by the French at Thebes, the other by Champollion in Turin. And Lepsius considers this last papyrus to be wholly of the date of the eighteenth or nineteenth dynasty, consequently fifteen hundred or sixteen hundred years before Christ, and the only example of an Egyptian book transmitted from the times of the Pharaohs. Bunsen believes it to belong to the fourth class of Hermaic books, containing Ordinances as to the First Fruits, Sacrifices, Hymns, and Prayers. In this book the deceased is the person who officiates. His soul journeying on gives utterance to prayers, confessions, invocations. The first fifteen chapters, which make a connected whole, are headed, "Here begins the Sections of the Glorification in the Light of Osiris." It is illustrated by a picture of a procession, in which the deceased soul follows his own corpse as chief mourner, offering prayers to the Sun-God. Another part of the book is headed, "The Book of Deliverance, in the Hall of twofold Justice," and contains the divine judgments on the deceased. Forty-two gods occupy the judgment-seat.