Who wrote the book of Acts?

The book of Acts, also known as the Acts of the Apostles, holds a significant place in the New Testament as it chronicles the early days of the Christian church, the spread of the Gospel, and the missionary journeys of the Apostle Paul. Understanding who authored this pivotal book can deepen our appreciation for its historical and theological insights.

The authorship of the book of Acts is traditionally attributed to Luke, a physician and a close companion of the Apostle Paul. This attribution is based on several pieces of internal and external evidence that point towards Luke as the writer.

Firstly, we consider the internal evidence within the text itself. The book of Acts is the second part of a two-volume work, the first being the Gospel of Luke. Both books are addressed to a certain Theophilus, a name that means "lover of God" or "friend of God." The Gospel of Luke begins with an introduction that states: "Since many have undertaken to draw up an account of the things that have been fulfilled among us... it seemed good also to me... to write an orderly account for you, most excellent Theophilus, so that you may know the certainty of the things you have been taught" (Luke 1:1-4, NIV). Similarly, Acts begins with a reference to the "former book" written for Theophilus, which recounts "all that Jesus began to do and to teach until the day he was taken up to heaven" (Acts 1:1-2, NIV). This clear connection between the two books suggests a single author for both, and early church tradition consistently names Luke as that author.

Secondly, the "we passages" in Acts provide further evidence of Luke's authorship. These passages, found in Acts 16:10-17, 20:5-15, 21:1-18, and 27:1-28:16, shift from the third person to the first person plural, indicating that the author was a companion of Paul during these events. For example, Acts 16:10 states, "After Paul had seen the vision, we got ready at once to leave for Macedonia, concluding that God had called us to preach the gospel to them" (NIV). This use of "we" suggests that the author was present with Paul, experiencing the events firsthand. Luke is known from Paul's letters to have been one of his traveling companions. In Colossians 4:14, Paul refers to "our dear friend Luke, the doctor," and in 2 Timothy 4:11, he mentions, "Only Luke is with me." This consistent companionship further supports the idea that Luke is the author of Acts.

External evidence from early Christian writings also supports Luke's authorship. The early church father Irenaeus, writing in the late 2nd century, explicitly attributes the book of Acts to Luke. In his work "Against Heresies," Irenaeus states, "Luke also, the companion of Paul, recorded in a book the Gospel preached by him. Afterwards, he wrote the Acts of the Apostles." Other early Christian writers, such as Eusebius and Jerome, confirm this attribution.

Luke's background as a physician is reflected in the detailed and orderly nature of his writing. His medical knowledge and attention to detail are evident in his descriptions of events and people. For instance, in Acts 28:8-9, Luke provides a precise account of Paul's healing of Publius's father, describing his illness and the subsequent healing in a manner that suggests medical familiarity: "His father was sick in bed, suffering from fever and dysentery. Paul went in to see him and, after prayer, placed his hands on him and healed him" (NIV). This attention to detail is consistent with the meticulous nature of a physician.

Luke's purpose in writing Acts goes beyond mere historical documentation. He aims to provide an orderly account of the spread of the Gospel and the work of the Holy Spirit in the early church. Luke emphasizes the continuity between Jesus' ministry and the mission of the apostles, highlighting the fulfillment of Jesus' promise to send the Holy Spirit to empower His followers. Acts 1:8 captures this central theme: "But you will receive power when the Holy Spirit comes on you; and you will be my witnesses in Jerusalem, and in all Judea and Samaria, and to the ends of the earth" (NIV). Throughout Acts, Luke demonstrates how the Holy Spirit guides and empowers the apostles, leading to the growth of the church and the spread of the Gospel.

The book of Acts also underscores the importance of unity and inclusivity within the early Christian community. Luke highlights the breaking down of barriers between Jews and Gentiles, emphasizing that the Gospel is for all people. Acts 10 recounts the story of Peter and Cornelius, where Peter receives a vision from God, leading him to understand that "God does not show favoritism but accepts from every nation the one who fears him and does what is right" (Acts 10:34-35, NIV). This theme of inclusivity is further reinforced in Acts 15, where the Jerusalem Council decides that Gentile converts do not need to follow the Jewish law to be part of the Christian community.

In addition to historical and theological themes, Luke's writing in Acts provides valuable insights into the early church's practices and challenges. He records the establishment of communal living, the appointment of deacons, and the resolution of disputes within the church. Acts 2:42-47 describes the early believers' devotion to the apostles' teaching, fellowship, breaking of bread, and prayer, painting a picture of a vibrant and committed community. Luke also does not shy away from recounting the persecution and suffering faced by the early Christians, highlighting their steadfast faith and reliance on God's guidance.

In summary, the book of Acts is traditionally attributed to Luke, a physician and close companion of the Apostle Paul. Internal evidence from the text, such as the connection between the Gospel of Luke and Acts, the "we passages," and Luke's medical background, supports this attribution. External evidence from early Christian writings further confirms Luke's authorship. Luke's purpose in writing Acts is to provide an orderly account of the spread of the Gospel and the work of the Holy Spirit in the early church, emphasizing themes of continuity, unity, and inclusivity. Through his detailed and thoughtful writing, Luke offers valuable insights into the early Christian community's practices, challenges, and unwavering faith.