Lesson 14 - Isaac: This lesson recounts the miraculous birth of Isaac, followed by the story of Hagar's exile at the hand of Sarah. Abraham's two sons, Ishmael and Isaac, are presented as types of the Old and New Covenants. The doctrine of substitution is again explored in the context of Isaac's deliverance by the sacrifice of the ram, another type of Christ. Other topics include God's reaffirmation of His promises to Abraham, His deliverance of Hagar and Ishmael, and Abraham's covenant with Abimelech. Lesson 15 - Isaac and His Family: The main theme of this lesson is God's providential preservation of the Messianic line. This is illustrated in the story of Isaac's marriage to Rebekah as well as God's choice of Jacob over Esau as the third heir to the Abrahamic covenant. Other topics include the death and burial of Sarah, the death of Abraham, and Esau's foolish sale of his birthright. Lesson 16 - Jacob, Part 1: This lesson covers the first part of the life of Jacob, beginning with his deception toward Isaac and exile to Haran. Jacob's time with Laban is explored in detail, including the strange events surrounding the rods Jacob used in his breeding program. Lesson 17 - Jacob, Part 2: This lesson begins with the story of Jacob's flight from Laban and recounts his journey back to Canaan, his reunion with Esau, and the slaughter of the Shechemites. God's choice and leading of Jacob is a major theme, including his midnight struggle with the angel, and his position as Israel, the head of God's people. Also included is an overview of the twelve tribes.