"In the orb of divine light"

This article focuses on the theology of Diadochus of Photice, a fifth-century bishop and theologian, whose spiritual thought is examined through the lens of the concept of "energy" (energeia). The study analyzes the way in which Diadochus employs this notion to account for the divine influences exerted on the human soul, particularly those of a luminous, pacifying, and spiritually fruitful nature. The approach is that of a theological and historical study based on an examination of this author's texts. The central idea is that divine light constitutes a mode of God's action upon humanity, calling the latter to active cooperation. The contribution of the article lies in the light it sheds on the patristic roots of the theology of divine energies, anticipating doctrinal developments that would reach their full flowering in the later hesychast tradition.