Abraham, Sarah, and the Allegory of Law vs. Grace | Genesis 20-21
Les Feldick Bible Study
bible study
February 1, 2026
B4L12
In this Bible study on Genesis 20 and 21, Les Feldick explains the birth of Isaac and the deeper spiritual meaning behind Abraham casting out Hagar and Ishmael. Discover how the Apostle Paul uses this Old Testament story in Galatians 4 to teach the crucial difference between Law and Grace.
Lesson Summary
Les walks through Genesis 20 and 21, starting with Abraham’s moment of weakness in Gerar and God’s faithful intervention to protect the promised line of the Messiah. The lesson then moves to the long-awaited birth of Isaac and the conflict that arises with Ishmael.
Les connects these events directly to the New Testament, using Galatians 4 to show that Hagar represents the Law (bondage) and Sarah represents Grace (freedom). This teaching answers important questions about why believers are not under the Law and how to understand the battle between the flesh and the Spirit.
Chapters
00:00 – Introduction & Overview
01:53 – Genesis 20: Abraham’s Weakness & Satan’s Attacks
05:30 – The Danger of "Fence-Dwelling" for Believers
07:39 – God Intervenes to Protect Sarah
09:19 – Genesis 21: The Birth of Isaac
11:55 – Sarah Demands Hagar and Ishmael Be Cast Out
13:28 – God Tells Abraham to Listen to Sarah
15:17 – Connecting Genesis to Galatians 4
17:30 – The Allegory of Law vs. Grace (Galatians 4:21-26)
19:09 – Diagram: The Difference Between Israel and the Church
21:10 – Why Law and Grace Cannot Mix
25:27 – Romans 6: We Are Not Under Law, But Under Grace
26:40 – Conclusion: The Distinct Difference
Watch More
If you enjoyed this study, please check out our other videos for more verse-by-verse Bible teaching. Be sure to subscribe to the Les Feldick Bible Study channel for more updates.
#LesFeldick #BibleStudy #Genesis #LawVsGrace #Galatians4
Scripture
GenesisGenesis 20Genesis 20-21GalatiansGenesis 21Galatians 4:21Galatians 4:21-26Romans
Topics
les feldickbible studyles feldick bible studygenesis 21law vs gracemeaning of hagar and sarahallegory of galatians 4abraham and sarahbirth of isaaccast out the bondwoman












