This article studies the literary and theological background of the Sermon on Law and Grace, a famous oration by Ilarion, the (future) Metropolitan of Kyiv, from the mid-eleventh century. The author of this article focuses also on potential patristic models for Ilarion’s theological and patriotic reflection on the recent East Slavic history in the light of the official adoption of Christianity under Volodymyr Sviatoslavich, Prince of Kyiv. The main feature of the mentioned (self-)reflection, relying on the notion of history as the history of salvation, is disregarding the Byzantine political and cultural superiority and, simultaneously, emphasizing the justice of God, who brings his grace equally to all peoples, thus positioning them on the same spiritual level. This kind of reasoning was not a peculiarity of the Rus’ culture but formed a wider phenomenon defined by apologetic attitude and was characteristic of the entire religious-literary tradition of the East Orthodox Slavs between the tenth and sixteenth centuries. While trying to construct a theological justification of the historical value of Kyivan Rus’, Ilarion adapted patristic patterns coming from Byzantium, for example, the explanation of (dis)continuity between the Law of Moses and Christ’s mercy, particularly following Gregory Nazianzen and Patriarch Nicephorus I, or perception of a polity led by a Christian ruler, particularly following Eusebius of Caesarea. 
 Keywords: Sermon on Law and Grace, Ilarion, Rus’ literature, history of salvation, patristic models