I imagine, moreover, that the reason we need to think about this story of the [burning] bush and its unsettling invitation is that our society is in deep crisis. It is clear that most of our old patterns of life together are not working. This is indeed a time when the church may gather together in order to think and pray and act differently. We are people who believe that God's old promises for well being and justice still persist in the world. We are people who believe that God's resolve for liberation in the world and of the world is a resolve of urgency that still pertains to the abused. And we are the ones who know that the promissory, liberating work of God devolves upon folk who do God's work in the world.
– Walter Brueggemann, The Threat of Life: Sermons on Pain, Power, and Weakness, 22-23.