Sunquist views spirituality as the foundation for all mission involvement, for mission practice springs from spiritual formation. He highlights the Holy Spirit in the work of mission and emphasizes its trinitarian nature. Sunquist explores mission from a primarily theological--rather than sociological--perspective, showing that the whole of Christian theology depends on and feeds into mission. Throughout the book, he presents Christian mission as our participation in the suffering and glory of Jesus Christ for the redemption of the nations.