Of the period including the time that Moses left his mother and sister to dwell in the palace of the Pharaohs, and receive the education of an Egyptian prince, we have no record in the sacred narrative, except the declaration of Stephen in the book of Acts, that he was learned in all the wisdom of the Egyptians, and mighty in word and deed.
In Smith's Dictionary of the Bible there is a brief _résumé_ of what is said by ancient authors of this period of his life. According to Strabo, he was educated at Heliopolis, and grew up there as a priest, under his Egyptian name of Osariph. According to Philo, he was taught the whole range of Greek, Chaldee, and Assyrian literature. From the Egyptians, especially, he learned mathematics, to train his mind for the unprejudiced reception of truth. He invented boats, engines for building, instruments of war and of hydraulics, and also understood hieroglyphics and mensuration of land. He taught Orpheus, and is thence called by the Greeks Musæus, and by the Egyptians Hermes. According to Josephus, he was sent as general of the Egyptian army on an expedition against Ethiopia. He got rid of the serpents, in the countries through which he was to march, by turning basketfuls of ibises upon them. Tharbis, the daughter of the King of Ethiopia, fell in love with him, and induced her father to surrender to him; and he returned in triumph with her to Egypt as his wife, and founded the city of Hermopolis to celebrate his victory. We see here, that if Moses remained true to the teachings of his mother and sister, and the simple faith of Israel, it was not for want of the broadest culture the world afforded. Egypt was the cradle of arts and letters, and the learned men of Greece traveled there to study the mysteries which were concealed under her hieroglyphics. Moses was a priest of Egypt in virtue of being a prince of a royal house. According to the Egyptian tradition, although a priest of Heliopolis, he always performed his devotions outside the walls of the city, in the open air, turned towards the sunrising. According to the language of St. Paul, "he endured as seeing Him that is invisible."
In Wilkinson's "Egypt," we have some interesting suggestions as to the life and training of the Egyptian priest, which go far to show what manner of education must have been given to Moses. The utmost purity of person was enjoined. Daily and nightly bathing of the whole person, a dress of pure linen, great exactness as to food, with strict dietetic regulations, were also a part of the training. The Egyptians were the fountains of physiological and medical knowledge to the nations of antiquity, and undoubtedly these studies were a part of the "wisdom" of the priests. Moses must also have passed through the lesser and the greater initiation into the mysteries of Egypt; in which were taught the unity of God, the immortality of the soul, and the retributions of a future life. Thus he had an opportunity of comparing that portion of the Divine teaching and traditions which had descended through Egypt, with the pure stream which had flowed down through the patriarchal families.