Our goal as Christians is never simply to build our own tribe. Instead, we seek the peace and prosperity of the city or community in which we live through a gospel movement led by the Holy Spirit, a movement united by the gospel of Jesus Christ, a common mission to reach and serve others, and a commitment to be gracious and generous to those who disagree with you.

In Serving a Movement, best-selling author and pastor Timothy Keller looks at the nature of the church's mission and its relationship to the work of individual Christians in the world. He examines what it means to...