"Yaroslav...assembled many scribes, and translated from Greek into Slavic. He wrote and collected many books through which true believers are instructed and enjoy religious education. For as one man plows the land, and another sows, and still others reap and eat food in abundance, so did this prince. His father Vladimir plowed and harrowed the soil when he enlightened Rus' through baptism, while this prince sowed the hearts of the faithful with the written word, and we in turn reap the harvest by receiving the teaching of books. For great is the profit from book-learning. Through the medium of books, we are shown and taught the way of repentance, for we gain wisdom and continence from the written word. Books are like rivers that water the whole earth; they are the springs of wisdom. For books have an immeasurable depth."