RUDN Journal of Language Studies, Semiotics and SemanticsRUDN Journal of Language Studies, Semiotics and Semantics2313-22992411-1236Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)7117Research ArticleAetiological Arguments of the ‘Form and Content Correlation’ Mediaevil Principle: Liturgy Sermon of Metropolitan IlarionValentinovaO IThe General and Russian Linguistics Department Philological Facultykaf_yazik_rudn@mail.ruPeoples’ Friendship University of Russia15042013451708092016Copyright © 2013, Valentinova O.I.2013Meaningful and structural features of the mediaeval liturgy gospel are determined ontologically — this is the essence of this article, undertaking the interpretation of the well-known text dating back to the middle of the XI century — “Sermon on the Law and Gratia” by metropolitan Ilarion.ontological demandmeaningful modelcompositional modelrhythmic modelprinciple of generating symbolic sensesонтологическая необходимостьсмысловая моделькомпозиционная модельритмическая модельпринцип порождения символических смыслов