SummaryMusic intended to evoke awe-inspiring fear in the presence of transcendence may be found throughout the work of Olivier Messiaen (1908–1992). The emotion's genealogy extends back through Hebrew and Christian scriptures (‘Fear of the Lord’), the Romantic period (‘sublime’), and the early twentieth century (the creature feeling response to the ‘numinous’ and ‘wholly other’). Messiaen's understanding of this emotion particularly derived from distinctions made by the French Catholic spiritual writer Ernest Hello (1828–1885). Hello distinguished between simple fear (la peur) that (...) makes us cower and the fear of ‘awe’ or ‘wonder’ (la crainte) that opens up possibilities of adoration and self-transcendence. This essay surveys several instances of Messiaen's evocations of fear in works dating from the 1940s through the 1970s. It then concludes with a brief consideration of Apparition of the Eternal Church (2008), a documentary film that records auditors’ reactions as they listen through headphones to Messiaen's crushing organ work (c. 1931/2) with the same title. A concluding question is posed to recent research in the ‘history of emotions’. If listeners do not share communal emotional categories of transcendence, to what extent can they experience Messiaen's intended ‘awe’ (la crainte) as something more than mere ‘fear’ (la peur)? (shrink)