Who are Abraham's descendants? 3 - Book of Hebrews (11/14)

There is no question that God made a unilateral promise to Abraham and this promise will be fulfilled. There is no question that God made a series of bilateral promises with Abraham's offspring which they failed to carry out. Therefore, God cannot be bound by a broken covenant to keep His end of the bargain. This is the proper explanation for the presence of a "new covenant" that has better promises.