In this article I attempt to enter the less studied ‘working room’ of the hagiographer and metaphrastes Gregory Palamas by contextualizing and analyzing, both on its own terms and comparatively, Palamas’ literary debut, the Logos on Saint Peter of Athos (BHG 1506). The article shows to what extent the hagiographer used, changed, supplemented, departed from his source—the tenth/eleventh-century Vita of Saint Peter (BHG 1505) written by a certain Athonite monk Nicholas—and refashioned the image of the saint when (re)writing his life.