Play it again...Moses?

"These are the words that Moses spoke to all Israel"(Deut. 1:1). The book of Deuteronomy, literally the "second law" is known to be Moses' review of the laws in the other books of the Torah. Certain passages are repeated almost word for word such as the retelling of  the Ten Commandments (Deut. 5:6-18).  This begs the question, if G-d is perfect and gave over the Torah to Moses in the first four books, why does Moses, a mortal, need to get involved in retelling it according to his finite understanding.
In order to understand this better, we must better understand the two ways of teaching or explaining a system of laws and values. One way of giving it over is by rote. The teacher passes over the material word for word as he himself learned it but adds nothing of his own. This is Moses' role in the other books. He merely serves as a bridge between the people and G-d. However, there is a deficiency to this method of teaching in that the giving of the material is by rote, the receivers cannot relate to the material in a personal way. On the other hand, when the teacher internalizes the material and gives it over according to his grasp, then his audience and students have a better chance of understanding the material and internalizing it as well.

This is also the role of all the other prophets of the Jewish people, as well as Rabbis and teachers throughout the generation. Their role is to explain the Torah to their audience according to their understanding so that they can keep its laws and apply its teachings to every situation. This is also why Samuel's mother, Hannah, calls G-d the Master of Legions in her prayers (I Samuel 1:11). 

Samuel initiates the era of the Prophets, the era in which the Torah begins to be translated and applied further through Divine Revelation in the prophets' minds.  This translation and elaboration means that G-d's Word is made more accessible and comprehensible to His Legions, to the plurality of his creations down in this world. Through the prophets, and afterwards the Rabbis, the teachers of each generation, the Five Books of Moses can have more of a personal significance and relevance to their students and followers.