Once I asked my favorite seminary teacher how much of the N.T. was Hebrew and how much Greek. He looked at me fixedly for a moment, then replied, "I would say about half and half".
At the time I was a recently commited Christian, and his answer was kind of a shock. Now, 49 years later, I'm coming to perceive some things anew.
Plato's Cave has always been an engrossing story, but perhaps it is more. How does it compare with the gospel of Jesus?
Or take another example: look at The Myth of Er. If this exceeds your span of attention, we might try a much briefer summary.
Even more briefly the myth of Er concerns the afterlife, where men are judged and recieve a reward or a punishment.
Students of the O.T. learn that the afterlife was very nearly non-existent there, except for a shadowy place called Sheol where everyone goes after death. Now if the ideas of Jesus came purely from divine inspiration, this suggestion does nothing for such a person. But if you perceive that Jesus' learning came in more natural ways like yours and mine, then you have to wonder where his Last Judgment came from.
Sepphoris, the capital of Galilee, was abuilding when Jesus was working as a young carpenter (and stone mason). It was very much of a Greek city; the area was very much of a multi-cultural place, and workmen there would be expected to know Greek. Did Jesus know only the simple elements of the language? Or did he know more??? Is it reasonable to suppose that he may have known something about Plato?