Luke-Acts as a Single Work: Almost all scholars and ancient tradition agree that the Gospel of Luke and the Book of Acts are two volumes (or two scrolls) of the same single, combined book.
Printing Order Obscures Connection: The current New Testament printing order, where the Gospel of John separates Luke and Acts, obscures the original connection. The speaker suggests printing them together.
Qumran and Nag Hammadi Texts: Texts like those from Nag Hammadi show a far more diverse form of early Christianity than the narrative presented in Luke-Acts, which focuses on a community moving toward proto-orthodoxy or possibly Marcionitism.
Luke-Acts and Marcionitism: The story in Luke-Acts of moving from a Jewish sect to predominantly Gentile Christianity could have paved the way for Marcionitism, which sought to excise all of Judaism from Christianity. The author of Luke-Acts, however, was a "god-fearer" interested in the Septuagint (Hebrew Bible). Marcion liked the Gospel of Luke but not Acts.
Mentions of "Luke" in Epistles: The mentions of "Luke" in later Pauline epistles (often considered forgeries) are not evidence that the name Luke was attached to Luke-Acts at that time. The authors likely borrowed names of Paul's authentic companions to add "verisimilitude" (the appearance of being true or real). The name Luke was not attached to Luke-Acts until the late second century (by Irenaeus and in manuscripts).
Absence of Writings from Jesus/Original Disciples: The absence of writings is not surprising because:
Writing was not seen as essential for the founder of a movement. Socrates also didn't believe in writing things down.
Founders often focus on their own lifetime.
Jesus and the original disciples (carpenter/woodworker, fishermen) were from modest, peasant backgrounds and lacked the means to write extensively.
Writings began when the movement expanded and converted educated, wealthy people like Paul, who was literate and had a patronage network and scribes.
The first Gospel (Mark, c. 70 CE) was written by a literate Christian, reflecting an "evolved perspective" of Jesus, making the historical Jesus hard to glimpse.
Theological Conception of Jesus: The idea of "God sending his son" is a later injection into Christianity, not necessarily dating back to the historical Jesus. The historical Jesus is distinct from the Jesus of scripture or the Christ of theology.
Purpose of Acts:
It doesn't seem to have been written to "erase competitors" because, unlike the Gospel of Luke, Acts had no apparent competitors.
The main objective was to explain the journey of the community (primarily Gentile Christians) and assure them that their expansion to the Gentiles was "the plan right from the beginning."
It provides assurance that "God is not a welter" (fickle) and has not rejected the people of the first covenant on a whim.
John the Baptist in Luke-Acts: Luke-Acts provides a unique extended nativity story that makes John the Baptist the child of Zachariah and Elizabeth and the cousin of Jesus, a tradition likely created by the author of Luke-Acts.
Acts as Expansion/Fanfiction: Acts is not a "fanfiction" or simple expansion of Mark; it is intimately connected to the Gospel of Luke, which itself is an expansion/rewriting of Mark.
James as Head of the Church: The tradition that Peter is the "rock" upon which the church is built is only found in Matthew. Multiple, earlier sources (Paul's letters, Acts, Gospel of Thomas) indicate that James, the brother of Jesus, was the head of the church in Jerusalem.
Pseudepigraphal Letters of Paul: The authors of the fake Pauline letters likely did not know about Luke and Acts, and the letters are not dependent on the Gospels or Acts; they were written around the same time.
Border-Making and Anti-Semitism: Luke-Acts, along with the Gospel of John, shows the emerging Christian community beginning to "make borders" against their former co-religionists (other sects of Judaism). This "harsh border making" in formative texts unfortunately contributed to later Christian anti-Semitism, though the first-century texts themselves are primarily defining their separate identity.
God-Fearers and the Septuagint: Both Acts and Paul's letters agree that Paul was very successful in converting "god-fearing Gentiles" (Gentiles who worshiped the Jewish God and knew the Septuagint/Old Testament) who attended the synagogue, while having more trouble converting ethnic Jews.
Paul as Apostle in Acts: The author of Acts mostly avoids calling Paul "the Apostle Paul," but does refer to a group including Paul and Barnabas as "the apostles" in one oblique reference. Paul is certainly not presented as one of the original 12.
The "We Passages": The "we passages" (where the narrative switches to first-person plural) are debated. They could imply a companion of Paul, a literary figure of speech (like a redactor), or a false claim of companionship. The speaker is not fully persuaded by any single theory, noting that if the author were pretending to be a companion, they would likely "play it up a lot" more.
Popularity of Paul's Letters: Paul's letters became popular independently of Acts. Paul founded churches, and the communities treasured his letters. Later admirers collected them in the second century, leading to their widespread popularity.