But it's all real. All of it.
Utterly real.
And that's regardless of what is metaphor and what concrete, or what mix of the two. For instance the parables are about the most central and real truths of existence, life. More true than general knowledge we think of as 'fact'.
(for instance, I've directly measured the speed of light in a sophomore physics lab, and I'm especially confident in the factual reality of number for the speed of light in a vacuum to high precision, so that's a very strong fact to me. But the truths Christ tells me in the parables are more essentially crucial and reliable and solid and real. I know what He says will happen. While there could be in contrast some quirk about the speed of light we don't understand yet, His truths I can feel more confident in even more than Maxwell's equations for electromagnetism. God could decide to toss this physics, and Maxwell's equations with it, next week. But Christ's words will be true literally forever.)
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(btw, just my view, but I would not assume #5 is correct. Nor #6, though I don't know for sure whether we could be near the beginning moments or lead in)