לקוטי שיחות חלק ד׳ - דברים

The statement, “Moshe said Mishneh Torah on his own,” means that the word of Hashem became invested within Moshe.

The meaning of “Moshe said Mishneh Torah on his own” is that the word of Hashem became clothed within Moshe, to the point that “the Shechinah spoke through Moshe’s throat.” Since the Jewish people were preparing to enter an inhabited land, they needed to receive the Torah through an intermediary.

The same applies to “everything that an experienced student will one day introduce.” This, too, is the word of Hashem as it is drawn down below. It is specifically through this process that the Torah extends downward “until the last sea”—that is, until the period of ikvesa deMeshicha, the final generation before Mashiach.

This is why Parshas Devarim is read on the Shabbos preceding Tisha B’Av. Shabbos is above sin, and the Shabbasos of Bein HaMetzarim represent Hashem’s practice of preparing the remedy before the blow. They are therefore the remedy for Tisha B’Av, and in this respect they are even higher than other Shabbasos.

For this reason, Parshas Devarim is read then. Outwardly, the parshah contains words of rebuke. Yet through this itself, we ultimately reach “until the last sea,” referring to the future Geulah through Mashiach Tzidkeinu.