What does Eastern Orthodox liturgy do? Is it a mimetic remembrance of Christ’s acts or about a transformation of the believers who come to worship? This paper explores the larger philosophical worldview within which patristic liturgy emerged in order to negotiate this tension between mimetic and transformative aspects of liturgical practice. It suggests that ancient philosophical conceptions of the cosmos and of soul and body underlie and can hence elucidate what Byzantine liturgy does. Liturgy tries to unify soul and body, heaven and earth, in a particular way. Liturgy seeks to transform the human person and the cosmos in such a manner that they come to image and match each other. The introduction to the paper briefly examines some contemp...