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Sometimes God shows up in power and might. Think Elisha and the prophets of Baal. Or Isaiah in the year King Uziah died. Or God talking straight with Job. Think the crossing of the Red Sea. There can be no mistaking the power, majesty, glory, and dominion of God in those moments.
But think, too, of the still small voice. Remember Jesus' silence before Pilate. Call to mind God walking in the Garden in the cool of the day, and asking simply, "Adam, where are you?" This moment in Abraham's life is an encounter with God. And God somehow manages to interact with him in such a way that he does not die (Exodus 33:20).
There's something about real people communicating real truth to real people. On this occasion the angels assume all the properties of real people. And their message is a message from God. We may think of angels as winged creatures with etherial appearance. But the message makes the angel. For the word angel itself means messenger. How many times have we heard a message from God and not recognized the messenger as an angel from God?
Whether child or adult, the blessings of baptism come from God through the word. And whether adult or child, they remain in the water apart from faith. Martin Luther rightly says, "Baptism is the water comprehended in God's command and connected with God's word." It offers the blessings of God: forgiveness of sins, life and salvation. And it does all this because the word of God is connected with the water. And those blessings are received by "faith that trusts that word of God (again, Luther).
And God is gone. We don't have a clear expression of God's omniscience at this point in the biblical narrative. God has not revealed himself as redeemer. God has not necessarily even revealed his name. There is no threat either. No, "or else." No, "if you don't..." Just a promise and a command. You will have a son. Circumcise all the males of your family. Perhaps here we need to read "family" as "household," a very extended grouping of people related to Abraham in any manner whatsoever.
Perhaps you are an Isaac: a child of God with whom God has established his covenant. Maybe you are a Sarah, one who will yet deliver a gift to the world. Are you a laughing boy, the child of promise, the fruition of your parents' hopes and dreams? If so, fulfill your destiny and become all God intends for you to become - under his gracious favor - no matter what your name may be. You might be an Ishmael, one who is not part of the covenant, but whom God will bless. Will you receive the invitation to join the covenant of the redeemed? Will you let God put his name on you and make you part of his family?
Maybe you've thought as I did that it was Sarah who first laughed and who therefore triggered the naming of Isaac (his name means, he laughs). Funny thing (pun intended!). I had it wrong. Abraham laughs first. So did Abraham. Sarah will have her time later, and will be called on it. God's word will be accomplished. What he says happens. From, "Let there be light," to "You will have a son," when God speaks, things happen.
Is there a promise of God that would invite your faith? Your tears? Your laughter? Believe this: God's promises are absolutely reliable, good, profound, and life-saving. That's no laughing matter.
Do you believe, trust, hope in, and wait for the eternal blessings of Jesus? Do you believe he is your righteousness? Are you baptized into the name of the Father, Son, and Holy Spirit? Do you repent daily and daily drown the old nature? Do you rely on God's grace in Jesus? It's that simple. Faith in Jesus gives eternal life. Without faith it is impossible to please God.
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