Genesis 21 reminds us that God keeps His promises. Isaac is born, Ishmael is delivered, and Abraham’s agreement with Abimelech prepares the way for promises that will be fulfilled generations later. For Israel, hearing this story on their way from slavery toward the Promised Land, the message was clear: God had been faithful before, and He could be trusted with what came next. The same is true for us: God’s past faithfulness gives us confidence to trust Him with what we cannot yet see.