The subject of research in this article is the vocal-symphonic concept of the oratorio-trilogy by Hector Berlioz “The Childhood of Christ” Op. 25, which is being viewed as a prime example of creative thought of that era (middle of XIX century), and being examined in form of analysis of musical composition, musical dramaturgy, fundamental plots and characters of Christianity, as well as emotional-psychological side of the musical content. Based on examination of the letters and Mémoires of Hector Berlioz the article presents a hypothesis on the genesis of the creative concept of the oeuvre, and offers facts from the history of its creation and performance. The plot motifs of Berlioz’s poetic libretto presented as units of the overall structure of the creative text. The author analyzes the particular aspects of the oratorio-theatrical embodiment of the space-time spiritual concept of eternity of Christian love, examines the fusion of spiritual and secular elements within the semantics of the creative text, give