In-Depth Notes on the Origins of Early Christianity and the Development of the New Testament

The historian Josephus recounts the internal strife among various Jewish factions during the Roman siege of Jerusalem.
While the Romans laid siege, Jewish groups fought amongst themselves rather than unifying against the external threat.
This discord reflects the state of Jewish society in the first century and contributes to the eventual separation between Christians and Jews.

The Jesus movement originally emerged as a Jewish-based movement.
It operated within the framework of Jewish traditions and concepts, including teachings and rituals.
The transformation from the Jesus movement to Christianity was gradual, occurring over several generations.
The movement can be described as mainly Jewish in the two decades following Jesus's crucifixion (early 30s to around 47-50 CE when Paul began writing).

Jesus was born around 4 BCE in Galilee, a significant area for revolutionary ideas and messianic movements.
His rise as a messianic figure occurred in a politically charged environment, aiming to liberate Jews from Roman rule.
Romans were initially tolerant of Jewish culture but became hostile to leaders claiming kingship that undermined Roman authority.

Jesus's crucifixion was a Roman, not Jewish, decision primarily due to its political implications.
The act of crucifixion served as a form of punishment and a deterrent to rebellion.
This led to the development of the narrative that blamed Jewish leaders for Jesus's death, a concept that fed into anti-Semitic sentiments through history.

Cognitive dissonance refers to the mental discomfort when beliefs counter reality; for the followers of Jesus, this related to their expectations of hope versus the reality of Jesus's death.
Early Christians grappled with the belief that Jesus would return within their lifetimes while facing the physical reality of his death.
This dissonance led to the redefinition of beliefs and the eventual development of doctrines that could accommodate these expectations.

Paul, a key figure in the early church, redefined concepts about sin, guilt, and righteousness, suggesting that faith in Jesus's sacrifice could replace adherence to Jewish Law.
He proposed that Jesus's death was a substitution for humanity's sins, introducing a theology that made Christianity more accessible to non-Jews.
Paul's writings (especially to the Romans and Thessalonians) emphasized the importance of faith over traditional Jewish law, enabling broader inclusivity within the movement.

The destruction of the Jerusalem Temple in 70 CE forced Jews to redefine their identity and practices away from temple worship.
Pharisees charted a new course for Judaism by promoting synagogue worship, while early Christians distanced themselves further from Judaism to avoid Roman reprisal.
This growing separation between Judaism and Christianity was evident in theological disputes and differing practices, particularly noticeable in gospels and writings emerging in the late first century.

The New Testament consists of 27 books written in Greek by varying authors, traditionally believed to include 15 or 16 different writers.
The period of authorship spans roughly from 48 CE (first Thessalonians) to about 100 CE.
The four gospels (Matthew, Mark, Luke, and John) each represent different perspectives on Jesus's life and work, though they are not necessarily eyewitness accounts.