Who says Luke wrote Acts?

Answer 1

Both Acts of the Apostles and Luke's Gospel were written anonymously, but there is no doubt that the author of Luke's Gospel was also the author of Acts. The question is only whether that author was in fact the apostle Luke.

Later in the second century, when the early Church Fathers were seeking to establish who probably wrote each of the gospels, they noted from Luke 1:1-5 that the author was not an eyewitness to the life of Jesus. They also believed that the authorship of Acts meant that the author must have known Paul. Finally, the elegant, educated Greek used in these books pointed to Luke, the physician and companion of Paul as the most likely author if he was one of the apostles.

Scholars now say that the author of Acts could not have known Paul or been his companion, because there are too many discrepancies between Acts and Paul's own account in his epistles; Acts is also commonly dated to the end of the first century or early in the second century, which is far too late for a companion of Paul. The author therefore remains anonymous.