A profound theological study that argues that Luke composed the Gospel and Acts to explain salvation history (Heilsgeschichte) after the delay of the Parousia (the second coming of Jesus). The author divides history in Luke's mind into three periods: the time of Israel, the time of Jesus, and the time of the Church. This book emphasizes that Luke views history as a series of stages orchestrated by God, with the time of Jesus as the center of time. The author also examines how geography in Luke's Gospel (e.g., the journey to Jerusalem) has a theological function, not just chronological. Luke wrote to provide theological assurance to the congregation that although Jesus had not yet returned, the church was living in a legitimate time of salvation. This book highlights how Acts shows the transition from the ministry of Jesus to the ministry of the church, where the Holy Spirit directs history. Therefore, this book is considered a highly influential classic in the study of New Testament theology.