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How did Augustine describe God using ideas drawn from Plato's Forms?

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Painting by Joseph Aubert of Saint Thomas Aquinas seated with a book, wearing a halo and black and white robes, surrounded by ornate patterns in St. Stephens Church, Jerusalem. — Western philosophy Painting of scholastic philosopher St. Thomas of Aquinas by Joseph Aubert, 1900.

St. Augustine of Hippo integrated Plato’s metaphysical theory of Forms into his Christian theology by identifying God as the supreme reality in whom these eternal patterns reside.12

Augustine described God using several key Platonic concepts:

Eternal and Immutable Truth: Augustine equated God with the eternal, incorruptible, and necessary Truth that exists beyond the sensory world. He argued that necessary truths—such as those found in mathematics and ethics—cannot originate from the mutable, temporal world or the human mind, but must exist as immutable principles within the divine mind.321
Divine Illumination: Drawing on Neoplatonic epistemology, Augustine taught that humans encounter these eternal truths not through sense experience, but through the "shining" of God’s light upon the human mind. This direct action of God allows the soul to perceive necessary realities.13
Creative Mind: Unlike some Neoplatonists who viewed the "One" as beyond being, Augustine conceived of God as the supreme reality whose creative mind contains the Platonic Forms as the regulative principles of all creation.1

While Augustine utilized these Greek ideas to defend and clarify Christian doctrine, he maintained a sharp distinction between the Creator and the creature, emphasizing God as an active, personal agent who created the universe out of nothing.12