Goodenough, E. R., By Light, Light: The Mystic Gospel of Hellenistic Judaism (New Haven, 1935), 180-198; idem, An Introduction to Philo Judaeus (2nd ed.; Oxford, 1962), 33ff; P. Borgen, Philo of Alexandria: An Exegete for His Time (Leiden, 1987); L. H. Feldman, Philo’s Portrayal of Moses in the Context of Ancient Judaism (Notre Dame, 2007).