After twenty-five years of waiting, God's promise to Abraham and Sarah is finally fulfilled in the birth of Isaac. Genesis 21:1–7 reveals the unwavering faithfulness of God, who accomplishes His purposes according to His perfect timing, even when His promises appear impossible from a human perspective. Through three movements—God's action, Abraham's obedience, and Sarah's joy—we see how God's covenant faithfulness produces obedient faith and transforms doubt into rejoicing. Abraham responds to God's Word through faithful obedience, while Sarah discovers the joy of experiencing God's goodness firsthand. This passage challenges believers to trust God's promises even when they cannot see their fulfillment. Our hope is not ultimately found in immediate answers to prayer or changed circumstances, but in the sovereign Lord who keeps His Word. In Jesus Christ, all God's promises find their ultimate fulfillment. Scripture: Genesis 21:1–7 Key Themes: God's Faithfulness, Divine Sovereignty, Covenant Promises, Waiting on God, Obedience, Faith, and Joy. For more information on River Community Church and its ministries, please visit https://www.rivercommunity.org