How did Neoplatonism influence St. Augustine’s Christian ideas?

Neoplatonism, particularly the works of Plotinus and Porphyry, profoundly shaped St. Augustine’s intellectual and religious development, providing a philosophical framework he integrated with his Christian faith.1

Key Influences

• Anthropology and Epistemology: Augustine adopted the Neoplatonic view of the soul’s superiority to the body. This led to his doctrine of illumination, which posits that human knowledge of eternal truths comes from God’s direct action on the mind rather than through sense experience.1
• The Problem of Evil: Augustine utilized the Neoplatonic principle of plenitude to explain evil. He argued that the universe is a hierarchy of being and goodness; evil is not a substance but a privative state—a "lack" of proper good occurring when creatures misuse their freedom.2
• Trinitarian Theology: Augustine attempted to make philosophical sense of the Trinity by finding analogies within the internal activities of the human soul, a process influenced by his reading of Neoplatonic texts.1

Critical Departures

While Augustine drew heavily from Neoplatonism, he rejected its emanationist view—which suggested the world was a continuous overflow of the divine—in favor of the Christian doctrine of creation ex nihilo, or creation out of nothing.2