We have a choice in how we laugh. In Genesis, Sarah models two kinds of laughter for us. The laughter of Ishmael or the laughter of Isaac? The laughter of Ishmael is either proud and mocking of others because of our imagined self-success, or its bitter as we mock ourselves or blame life for our failure. But the laughter of Isaac happens when we see that God has been patient and he’s blessed us, and even transformed us, despite our failures- It’s the laughter of relief, “how could I have been so stupid.”
Ishmael or Isaac? Ishmael is the way of ‘works’, of getting a son in a way they had a human ability to achieve. It’s a way of unbelief. Isaac: represents the way of grace and the way of Christ, of getting a son by simply waiting in faith for what only God could do. If you’ve never fully trusted Jesus Christ to be your promise- you are stuck in the dry, hot desert of reality without hope.
And for those here who have believed, watch out: don’t have the heart of Isaac but live the life of Ishmael. The place between the pieces, that place of unbelief, Jesus has already passed through for you. So you are free to believe and even free to fail- because the outcome is not up to you. Admitting there’s a space between your belief and unbelief.
Mark 9:24 is one of the most contradictory but accurate verses in the Bible about belief. “Lord I believe, help me overcome my unbelief!” This is the space where the Holy Spirit does his best work. Say it, pray it. And He will come. Both Isaac and Jesus are miraculous births that are acts of God’s saving grace. But Jesus is by far the greater one- because Isaac only points us to Christ, and its only in Jesus that we finally hear the laughter of God’s grace.