Pastor, teacher and theologian Ross Hastings addresses the fear and frustration that often accompany talk about the churchs missional vocation. There is an antidote to the "locked door" syndrome that affects us now as it did that band of apostles in the upper room. Hastings directs us to the foundation of hope in the trinitarian commission of John 20 where Jesus grants them his peace by breathing on them his Spirit. He formed them into his community of shalom. Leaving that place of isolation, these "sent ones" went out to participate in God's own ongoing mission to the world. Hastings tackles the dual challenges of isolation from and accommodation to the surrounding culture. In doing so he opens up a theological vista on the missional character of our trinitarian God and the missional identity of his church. Building on the works of David Bosch, Lesslie Newbigin, Christopher Wright and Darrell Guder, the author corrects numerous dichotomies that hinder the church. In the power of the Spirit the gathered church is spiritually transformed and also scattered as it proclaims God's forgiveness and freedom Hastings presents here a comprehensive theology of mission. In doing so he confronts the fears and pessimism that erode our faithful effort to join in Christ's mission to the world.