When God’s promise is finally fulfilled, Abraham’s long-standing fear loses its power. Faith matures from striving and self-protection into trust, integrity, and worship.

1. Promise Kept After Long Delay

• God fulfills His word exactly as spoken:
  • “The LORD visited Sarah as He had said, and the LORD did to Sarah as He had promised.” (Genesis 21:1, ESV)
• Isaac is born when Abraham is 100 and Sarah is 90 (Genesis 21:5; cf. Genesis 12:4).
• The promise waited 25 years, eliminating all human credit (cf. Romans 4:19–21).

2. Faith No Longer Needs a Backup Plan

• Ishmael, born when Abraham was 86 (Genesis 16:16), is now a teenager.
• God commands Abraham to release the son of the flesh:
  • “Whatever Sarah says to you ...