Introduction to Deuteronomy

This book repeats much of the history and of the laws contained in the three foregoing books: Moses delivered it to Israel a little before his death, both by word of mouth, that it might affect, and by writing, that it might abide. The men of that generation to which the law was first given were all dead, and a new generation was sprung up, to whom God would have it repeated by Moses himself, now they were going to possess the land of Canaan. The wonderful love of God to his church is set forth in this book; how he ever preserved his church for his own mercies sake, and would still have his name called upon among them. Such are the general outlines of this book, the whole of which shows Moses' love for Israel, and marks him an eminent type of the Lord Jesus Christ. Let us apply the exhortations and persuasions to our own consciences, to excite our minds to a believing, grateful obedience to the commands of God.

-- taken from Matthew Henry's Concise Commentary