It’s a crazy reversal. In Chapter 6 Isaiah makes himself radically available to God. “Here am I,” he says to God. But in Chapter 58 this flips. There it is God becoming radically available to us. “Here am I,” God says.

And when does this happen? It happens when God’s people engage in true worship, when our fasting becomes connected with loosing the chains of injustice, sharing food with the hungry, providing shelter for the homeless and clothing the naked.