Heidegger's Bible Handbook: Deuteronomy: The Purpose of Deuteronomy
3. The Scope, the confirmation of the doctrine of the law through repetition, and the commendation of the reading and observation of the same.
Whence also the scope/goal of this book is understood with little effort: that is, so that the law previously delivered by God by this new iteration might be more fully confirmed, declared, and applied to the present condition of the Israelites, and ultimately not only read publicly, both on individual Sabbath Days, Acts 15:21, and during the feast of tabernacles in the year of remission, Deuteronomy 31:10, 11, but also set before the King to be read, meditated upon, and observed, the whole time of his life, Deuteronomy 17:18. Which thing, even if it were in fact peculiar to the Israelites, by type and shared rationale pertains to the whole Catholic Church, and to each of its members.