What Type of Relationship is a Brit?

The Tanakh uses many paradigms to describe the relationship between Hashem and Am Yisrael, among them Av, Ro'eh, and Melekh. But just what does it mean that Hashem is a "brit partner" with us? In this shiur we will see how the Torah patterned our relationship with Hashem after a special type of relationship that existed between kings in the ancient world: the relationship of a vassal king to a soveriegn king, in a way that sheds new light on our Avodat Hashem.