The question of whether a supreme authority can perform resistance – a notion presupposing confrontation with a force that is equal, if not superior – is here addressed through the case study of Emperor Julian’s opposition to Christianity. During the year and a half of his rule, Julian engaged in attempts to control the religious life of the Roman Empire, seeking to reverse the religious agenda pursued by his Christian predecessors Constantine and Constantius II. His writings, however, do not voice a top-down approach to religious confrontation, but rather deploy forms of expression that are traditionally associated with subaltern dissidents, such as humour and figured speech. Julian’s literary choices point to his self-perception – and self-narrative – as grappling with forces that were greater than his contingent position of authority. In particular, the positioning of his response to Christianity in the field of philosophy (Against the Galileans) betrays his alertness to contemporary narratives of Christianity as the system of knowledge that had displaced the philosophical schools of Greece and Rome. To this claim, Julian reacted with a defence of Greek philosophy and religion against what he perceived as Christianity’s aggressive and power-endorsed intrusion in the spheres of theology, philosophy, and interpretation of history.