The Christian life is mysterious, and to know and live the Christian life is not an easy thing. In this book Witness Lee presents a deeper understanding of the Christian life. He begins by defining the Christian life as both "the life in which the believers of Christ live Christ and magnify Christ" and also "the life in which the Christians live Christ and magnify Him corporately in their locality as a local church to be a local expression of Christ as a part of the universal Body of Christ." In the following chapters Lee presents the contents of the Christian life and helps the reader to experience the all-inclusive Spirit in order to live the proper Christian life.