Evagrius Ponticus (c. 345–399) stands as one of the most consequential yet theologically contested figures in the depth-psychology corpus’s treatment of early Christian inner life. His significance lies precisely at the intersection of monastic practice, psychological taxonomy, and contemplative theory. The corpus reveals a figure who systematized the interior life with an analytical precision that anticipates modern depth-psychological categories: his doctrine of the logismoi—thoughts that bewilder and distort perception—functions as an early phenomenology of cognitive distortion, while his articulation of apatheia as the goal of ascetic practice draws him into sustained controversy with Latin writers such as Jerome, who linked him directly to Origenist heterodoxy. The scholarly voices in the corpus—Hausherr, Sinkewicz, Sorabji, Kurtz, and the translated Praktikos itself—register both the breadth of Evagrius’s influence on Byzantine, Syriac, and Western contemplative traditions, and the complex fate of his writings, which survived largely under pseudonymous attribution after his condemnation. Climacus’s dismissal of him as ‘most foolish of the foolish’ captures the theological ambivalence he provoked. Yet Hausherr’s recovery of the Chapters on Prayer, alongside the Guillaumont critical editions, restored Evagrius to his proper place as architect of a fully systematized contemplative psychology that shaped Eastern hesychasm for centuries.