How did the Pseudo-Dionysius use Neoplatonic ideas in Christian theology?

Pseudo-Dionysius the Areopagite, an anonymous 6th-century author, integrated Neoplatonic philosophy—specifically the system of the 5th-century philosopher Proclus—into Christian theology to create a comprehensive mystical framework.123

His synthesis utilized several key Neoplatonic concepts:

• Apophatic and Kataphatic Theology: Borrowing from Proclus, he distinguished between kataphatic (affirmative) theology, which uses positive names like "Good" or "Wisdom" to describe God, and apophatic (negative) theology, which asserts that God transcends all human concepts and images.12
• Hierarchical Structure: He theorized that the universe, including the angelic world and the church, is organized into triads that serve as images of the eternal Trinity.12
• Mystical Ascent: He described a process of contemplative prayer involving the disciplined abandonment of senses and intelligible forms. This allows the soul to move beyond hierarchy and knowledge into the "divine darkness," achieving an ecstatic union with God.123

By framing the incarnation as the One entering into multiplicity, he provided a symbolic and dialectical explanation of the divine that profoundly shaped medieval Christian spirituality.1