Paul and the direct disciples of Jesus and the NT writers ALL believed Jesus was historical.
What are you talking about? Paul never met Jesus. And Paul is not a source for any information about Jesus' life, . . .
Yes he is, from the night of the arrest and after. It's BEFORE that point that Paul is silent on Jesus' life.
. . . so much so that some argue Paul was writing about a cosmic, not earthly, Jesus.
It's obviously BOTH. There is no contradiction between the earthly Jesus who was crucified and rose, as Paul describes, and the cosmic Jesus after. Paul presents both.
Paul was obviously referring to an earthly Jesus when he wrote:
None of the rulers of this age understood this; for if they had, they would not have crucified the Lord of glory.
1 Cor. 2:8
I.e., "the rulers of this age" has to refer to current earthly rulers.
Paul says many things which require Jesus to have been an earthly figure. But that doesn't contradict his more common references to Jesus as a heavenly or spiritual or cosmic entity.
Further, Paul himself is another figure for whom the only evidence is the NT.
But "the NT" is several writings, quite a bit of evidence. Back before 200 AD there was no such thing as "the NT" -- there were several of these writings.
But also, Paul is quoted by Ignatius of Antioch, writing around 100 AD, and by Clement of Rome around 95 AD. This is non-NT evidence for Paul.
That we have little evidence for Paul, outside his epistles and the Book of Acts, can be taken to suggest that maybe he wasn't so prominent in the 1st century as later tradition has made him. However, we do have some evidence for him outside the NT. It's incorrect to say that the "only" evidence is the NT.
You think he made up this important contemporary. You are off your head.
Who made up who? I don't know what you're talking about. Jesus was
not a contemporary of Paul's.
Yes he was. They overlap at about 30 AD. Paul's career was mainly later, but he had direct contact with Peter and other direct apostles. It's possible that he knew of the crucifixion when it happened, though maybe he only learned of it later. It was an event current to him.
He mentions his contact with direct disciples in Gal. 1-2, where he names Peter and James and others of the early Jerusalem church, and he describes some friction with them over his mission to the Gentiles. So he was a contemporary to Peter, making him also a contemporary to Jesus.
The point is that the Pauline letters, whoever wrote them, are not evidence for the Jesus of the Gospels.
Yes they are. They mention some of the same events, all from the night of the arrest and later. He mentions the "Lord's supper" event of that night, he says Jesus was "handed over" and gives his version of the resurrection event, naming Peter and others as having witnessed Jesus who had risen. So there is plenty of overlap of Paul's account and the Gospels at that point.
There's not one incident from the Gospels in Paul.
Yes there are -- several, from the point when Jesus was arrested.
So the question becomes: are the Pauline letters referring to a historical person?
The answer is YES, they refer to the same historical Jesus of the gospel accounts. Just because Paul emphasizes the later Risen Christ who ascended to heaven does not negate the earlier EARTHLY Jesus who was the same person. Paul clearly means they were the same.
And if the author of Paul didn't think of Jesus as a historical person, . . .
He DID think of Jesus as a historical person. He named particular events which happened to the same earthly Jesus of the gospel accounts. He even referred to Jesus as being the brother of James, which might not be true, but was believed by the writer of Acts and mentioned in Mark 6:3, and also is repeated in Josephus. That Paul believed this clearly proves that he thought Jesus was a historical person.
. . . then how could the author of Mark think so, writing after Paul?
They ALL believed Jesus was historical. All the evidence is that he was historical, and there's no evidence to suggest otherwise.
All the early Christians believed that Jesus was an earthly human, AND also that he was something superhuman, Son of God, Messiah, Heavenly cosmic being of some kind.
ALL of them, Paul included, had this same belief about Jesus.
Another person who believed Jesus was historical was the author of the Book of Revelation, who says nothing about the historical Jesus.
Also, the Epistle to the Hebrews was written by someone who thought Jesus was Cosmic but also earthly and historical. He said:
1 In many and various ways God spoke of old to our fathers by the prophets; 2 but in these last days he has spoken to us by a Son, whom he appointed the heir of all things, through whom also he created the world. 3 He reflects the glory of God and bears the very stamp of his nature, upholding the universe by his word of power. When he had made purification for sins, he sat down at the right hand of the Majesty on high, 4 having become as much superior to angels as the name he has obtained is more excellent than theirs.
You can't be more "cosmic" than this. And yet don't the opening words clearly refer to an earthly historical person who "in these last days" spoke to humans, "to us" -- to earthly people?
This epistle is probably not from Paul, but everyone agrees that the writer must have been close to Paul and had the same perception of who this Christ person was that they both spoke of. Hebrews is arguably more "cosmic" and abstract than Paul's epistles, and yet don't the opening words make it plain that the cosmic figure he presents was also an historical figure who appeared at a particular earth time and place?