Introduction
When Abraham was 75 years old, he left the city of Haran and traveled to the land of Canaan (Genesis 12:4-7). While in Canaan, God promised Abraham that his descendants would inherit the land. Although he believed God, Abraham did not understand how the promise would be fulfilled. He considered a servant named Eliezer as the heir of his house (Genesis 15:2), possibly because he did not expect to father a child since Sarah was barren (Genesis 11:30). Later, God told Abraham that he would have a child, and repeated the land promise (Genesis 15:1-7).
I. Isaac, Son Of Promise
A. Abraham was not told at first that his future heir would be a child from Sarah.
- Upon the insistence of Sarah, Abraham attempted to father a child with Hagar, the Egyptian handmaid (Genesis 16:1-2).
- When Hagar conceived, Sarah despised her, complained to Abraham and eventually received permission to deal with Hagar as she saw fit (Genesis 16:4).
- Sarah treated her so harshly that Hagar fled (Genesis 16:6).
- An angel of the Lord found Hagar in the wilderness and instructed her to return (Genesis 16:10-12).
- The angel promised to multiply the descendants of her son, whose name would be “Ishmael” (God hears).
- Hagar bore Ishmael when Abraham was 86 years old (Genesis 16:16).
B. Thirteen years later, God established the covenant with Abraham (Genesis 17:1-14, 23-24). The sign of the covenant was circumcision.
C. God changed Abram’s name to Abraham, which means “Father of a multitude,” and Sarai’s name to Sarah, which means “Princess” (Genesis 17:5, 15).
D. God revealed that Sarah would be given a son, Isaac (“He laughs”), as the son of promise (Genesis 17:15-21).
- Apparently, Abraham had believed all these years that the heir would be Ishmael, and even suggested such to God (Genesis 17:18).
- God repeated the name of Isaac to Abraham, and later to Sarah.
- Because both were advanced in years, Abraham and Sarah laughed to themselves (Genesis 17:17; 18:12).
E. Appropriate principles.
- God tells us that He will help us in this life, but does not always tell us how.
- God fulfills promises in ways we cannot always predict (Genesis 17:17; 18:12).
- We can feel certain that we are right, even if we are wrong (Genesis 17:17).
II. Abraham And The Sacrifice Of Isaac
A. When Isaac was born, Abraham circumcised him on the eighth day as God had commanded (Genesis 21:1-5).
B. He was told by Sarah and later by God to drive out Hagar and Ishmael (Genesis 21:10-13).
C. God commanded Abraham to sacrifice his son.
- Abraham gathered wood and fire, then traveled three days to Mt. Moriah (Genesis 22:3-5).
- He had Isaac carry the wood, while he carried the fire and the knife up the mountain.
- As they walked, Isaac asked, “Where is the lamb for the burnt offering?” Abraham replied, “God will provide” (Genesis 22:6-8).
- Abraham bound Isaac, laid him on the altar, and drew the knife.
- He intended to kill his son, knowing that God could raise him from the dead (Hebrew 11:17-19).
- An angel of the Lord stopped the sacrifice.
D. Appropriate principles.
- Man can trust in God’s providence without knowing His methods.
- We must be willing to give everything to God.
III. Paul’s Allegory
A. Paul contrasted Hagar and Ishmael with Sarah and Isaac (Galatians 4:21-31).
- The son born to the bondwoman was according to the flesh, relating Hagar to Mt. Sinai.
- The son of the free woman was according to promise, relating Sarah to Jerusalem.
B. As he contrasted these two families, Paul addressed a principle stated in Galatians 5:1; i.e., if we are free in Christ, we should not again submit to the yoke of slavery. If we submit to the Law, we have fallen from grace (Galatians 5:4).
Conclusion
Truly, Abraham is “the father of us all” (Romans 4:16). His faith and his works were approved by God (James 2:21-24). If we can follow after his good example, we can be a “friend of God” as well.
Questions:
- After God spoke to him (Genesis 12:1-3), Abraham still thought that his heir would be Eliezer. Later, he was sure that his heir would be Ishmael (Genesis 17:17). Finally, he learned that it would be Isaac. What does his example teach us?
- When God suggested that Isaac would be born, who laughed at the suggestion? Why did it seem funny?
- Walking up Mt. Moriah, what did Isaac ask his father? How did Abraham reply?
- Why would this sacrifice be so difficult for Abraham to accomplish (Genesis 22:2)? Why was it difficult to understand (Genesis 17:19)?
- What did Abraham’s act prove to God (Genesis 22:12)?
- Would Abraham have been justified if he had withheld Isaac?
- Explain how Paul’s allegory contrasts the old and new covenants.