In Genesis 21, we come to the long-awaited fulfillment of God's promise: the birth of Isaac. Abraham and Sarah waited 25 years, enduring moments of doubt, failure, and even laughter at the impossibility of God's word. Yet, at the exact time God appointed, He gave them a son. In this sermon, Pastor Sam unpacks: The miracle of Isaac's birth — why it was only possible by the hand of God. The testing of faith — how seasons of waiting grow and strengthen our trust in God. The transformation of Sarah's laughter — from disbelief to joy, and how this mirrors our own faith in Christ. Just as God fulfilled His promise to Abraham and Sarah, He has fulfilled His promise to us in Jesus Christ — the greater promised Son who saves us from sin and assures us of eternal life. Though the world may laugh at the gospel, for those who believe, it is the very power of God (1 Corinthians 1:18). Watch and be encouraged to trust God's promises, even when they seem impossible, and to find joy in the Savior who always proves faithful.