This is the Mentor's Guide for TUMI's Capstone Module 3 English course, Theology of the Church, which is one of 16 modules in the Capstone Curriculum. This book is intended to be purchased by TUMI satellites, mentors, or site coordinators for use within a TUMI Satellite. The Quizzes, Final Exam, and Answer Keys for this module can be found on the TUMI Satellite Gateway (this is available to all approved TUMI satellites). The Urban Ministry Institute (TUMI) is a ministry of World Impact, Inc. TUMI Satellites are a part of the TUMI Network, where leaders are developed in the local church using TUMI's curriculum and training system. The Church of God in Jesus Christ is one of the most refreshing and important themes of all the Scriptures. Jesus of Nazareth, through his death, burial, and resurrection, has been exalted as head over his new people, those called to represent him in the earth and bear witness of his already/not yet Kingdom. To understand the Church's role in God's kingdom program is critical to every facet of personal and corporate discipleship: there is no discipleship or salvation apart from God's saving action in the Church. Grasping what God is doing in and through his people empowers God's leader to represent him with wisdom and honor. The Church is foreshadowed in God's exalted purpose to bring glory to himself by saving a new humanity through his covenant with Abraham. Through its worship, witness, and good works, the Church through the ages displays the unity, holiness, universality, and apostolicity of its communion. In the Church, God displays his kingdom life and shares his offer of grace to the world.