Philo's allegorical treatise arguing that God cannot literally repent, feel anger, or have a body, using Genesis 6's flood narrative as its text.
On the Unchangeableness of God is one of Philo of Alexandria's allegorical commentaries on Genesis, taking as its starting point the verses describing God's decision to send the Flood: that "the Lord God" saw the wickedness of humanity, "took thought," and resolved to wipe out what he had made (Gen. 6:4-11). Philo's central philosophical claim is blunt: it would be the greatest impiety to suppose that the Unchangeable changes. Scripture's language of God changing his mind, feeling anger, or possessing hands and feet is, for Philo, accommodation to human weakness -- a pedagogical device the lawgiver Moses uses the way a physician tells a frightened patient a comforting half-truth, so that fear and love together can restrain people too coarse to be reasoned with directly.
Along the way Philo works through a chain of interpretive set-pieces built on the Genesis text: the meaning of Noah 'finding grace' before God, the symbolism of barrenness and fertility (Hannah's barren-then-fruitful soul versus the soul "in labor with many things"), the difference between a soul that begets virtue for itself alone versus for others, and an extended discourse on the four kinds of cohesion nature uses to hold together stones, plants, animals, and rational souls. He also treats leprosy as an allegory of voluntary versus involuntary vice, and closes with a long meditation on the 'royal road' of wisdom that the soul must travel between excess and deficiency, resisting the hostile power of 'earthly Edom.'
The treatise matters as a window into how an educated Hellenistic Jew reconciled a biblical text full of anthropomorphic, seemingly changeable divine action with the Greek philosophical conviction (drawn from Platonic and Stoic sources) that the truly existent must be static, impassible, and incorporeal. It is one of the clearest statements in ancient literature of the two-tier theological principle Philo repeats elsewhere: some scripture speaks strict truth about God as he is, and some speaks in the person of a man, for those who cannot yet receive the strict truth.
“For what impiety could be greater than supposing that the Unchangeable changes?”
— On the Unchangeableness of God · read this chapter →
“Now some, on hearing these words, suppose that the One Who Is makes use of angers and rages. But no passion whatsoever can be attributed to him”
— On the Unchangeableness of God · read this chapter →
“Nevertheless the lawgiver speaks of such things up to a point, as an introductory measure, for the sake of admonishing those who cannot be brought to their senses in any other way.”
— On the Unchangeableness of God · read this chapter →
“Let us then, without delay, try to walk the royal road”
— On the Unchangeableness of God · read this chapter →
“But soul, which differs from nature in three respects, the Maker made with sensation, imagination, and impulse”
— On the Unchangeableness of God · read this chapter →
It is Philo of Alexandria's allegorical commentary on Genesis 6:4-11, the passage where God 'took thought' about human wickedness before the Flood. Philo argues this language cannot describe God literally, since the truly existent cannot change or feel passion, and reads the text instead as pedagogical accommodation.
No. He states directly that no passion whatsoever can be attributed to God, and explains references to divine anger as language Moses uses figuratively, to instruct people who can only be corrected through fear rather than reasoned instruction.
He calls it the greatest impiety to suppose the Unchangeable changes, and argues that Moses' statement that God 'took thought' about making humanity must mean something other than literal reconsideration -- namely God's steadfast, unchanging judgment about human nature from the start.
It is Philo's allegory, built from Israel's request to pass peacefully through Edom's territory (Numbers 20), for the middle path of wisdom the soul must walk between excess and deficiency, refusing to trade with the vices personified as 'earthly Edom.'
He treats Noah's 'finding grace' before God and being 'righteous and perfect in his generation' as symbols of a soul that pleases God's powers, contrasting Noah with figures like Joseph, read as a mind devoted to the body rather than to virtue.
It shows an early, sophisticated Jewish attempt to reconcile the Bible's vivid, human-like depictions of God with a philosophical commitment to divine changelessness and incorporeality, a move that later shaped Christian and Jewish theology alike.
Allegorical Interpretation I · Allegorical Interpretation II · Allegorical Interpretation III · Every Good Man is Free · Flaccus · On Abraham · On Dreams · On Drunkenness · On Flight and Finding · On Husbandry · On Joseph · On Mating / Preliminary Studies