XIII. (66) We have already, then, gone through two parts of the life of Moses, discussing his character in his capacity of a king and of a lawgiver. We must now consider him in a third light, as fulfilling the office of the priesthood. Now this man, Moses, practised beyond all other men that which is the most important and most indispensable virtue in a chief priest, namely, piety, partly because he was endowed with most admirable natural qualities; and philosophy, receiving his nature like a fertile field, cultivated and improved it by the contemplation of excellent and beautiful doctrines, and did not dismiss it until all the fruits of virtue were brought to perfection in him, in respect of words and actions. (67) Therefore he, with a few other men, was dear to God and devoted to God, being inspired by heavenly love, and honouring the Father of the universe above all things, and being in return honoured by him in a particular manner. And it was an honour well adapted to the wise man to be allowed to serve the true and living God. Now the priesthood has for its duty the service of God. Of this honour, then, Moses was thought worthy, than which there is no greater honour in the whole world, being instructed by the sacred oracles of God in everything that related to the sacred offices and ministrations.
XIV. (68) But, in the first place, before assuming that office, it was necessary for him to purify not only his soul but also his body, so that it should be connected with and defiled by no passion, but should be pure from everything which is of a mortal nature, from all meat and drink, and from all connection with women. (69) And this last thing, indeed, he had despised for a long time, and almost from the first moment that he began to prophesy and to feel a divine inspiration, thinking that it was proper that he should at all times be ready to give his whole attention to the commands of God. And how he neglected all meat and drink for forty days together, evidently because he had more excellent food than that in those contemplations with which he was inspired from above from heaven, by which also he was improved in the first instance in his mind, and, secondly, in his body, through his soul, increasing in strength and health both of body and soul, so that those who saw him afterwards could not believe that he was the same person. (70) For, having gone up into the loftiest and most sacred mountain in that district in accordance with the divine commands, a mountain which was very difficult of access and very hard to ascend, he is said to have remained there all that time without eating any of that food even which is necessary for life; and, as I said before, he descended again forty days afterwards, being much more beautiful in his face than when he went up, so that those who saw him wondered and were amazed, and could no longer endure to look upon him with their eyes, inasmuch as his countenance shone like the light of the sun.