The Sermon on Law and Grace (Church Slavonic: Слово о законѣ и благодѣти, romanized: Slovo o zakoně i blagoděti) is a sermon written by the Kievan Metropolitan Hilarion. It is one of the earliest Slavonic texts available, having been written several decades before the Primary Chronicle. Since Hilarion was considered to be a writer worthy of imitation, this sermon was very influential in the further development of both the style and content of Kievan Rus' literature.The Sermon was an important event to be mentioned in the Primary Chronicle, and by matching against other events from the Chronicle it was concluded that the Sermon was written somewhere between 1037 and 1050. Source: Wikipedia (en)