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Replying to post 1 by Zzyzx]
In their pre-scientific mindset, the Ancients may have
intended some things to have been taken literally, but now fail the test of reality.
The flood story being the prime example. The Ancients probably believed it literally. We now know it couldn't have happened, for various physical and biological reasons.
But we moderns can still derive benefit from the story, as a myth of regeneration from the remnant. That principle can be applied to various aspects of real life. Regaining a fortune from what's left from a bankruptcy and a good idea, etc. To cite another myth, the Phoenix rising from the ashes. Things can work on different levels, like the Fractured Fairy Tales, from Rocky and Bullwinkle.

. When the literal fails, oftentimes the mythic element still works.
Methodology? Mine is to reject those things in the Bible which contradict Reason, or not to take those things literally. The above mentioned Flood, and also walking on water would be examples of those.
To
accept the things that accord with Reason, the moral and ethical teachings such as the Golden Rule, etc.
But some things
transcend Reason. The basic belief in God, for example. So far, neither proven or disproven by science and Reason. So the acceptance or rejection of those depend in the inclination of the person in question, and it is doubtful that any amount of reasoned debate will persuade, one way or the other. Regarding things transcendent anyway. Hopefully, (if the debaters in question are being honest) they
can be persuaded either way, on the things that can be shown to be true or untrue. (Do people walk on unfrozen water? Have they ever?)
Also my method is to focus on the timeless and essential aspects of the Bible, and not to worry to much about the peripheral. An example of the peripheral would be Paul's admonition for women to stay in their place and not speak in Church. By contrast, an example of the essential would be this...Jesus described both Golden rule and the two great Commandments of love as the "Law and the Prophets". Love of God and neighbor. The essence of the Law, and of the Bible as a whole. Everything else in the Good Book should be interpreted in light of those fundamental principles. The keeping and the beating of slaves would fail that test, and should be rejected.
The basic teaching of God's mercy for the contrite would be another example. The complex and unlikely theology of blood-redemption, by contrast, is superfluous at best, barbaric at worst and really does not stand up to reasoned scrutiny. God sacrificing Himself to Himself in order to give Himself permission to forgive, makes no sense at all. He could just simply forgive right off the bat, those sincerely seeking forgiveness. And I believe He does, and there are many Bible passages that support this position. (The parables, especially the Prodigal Son, the Beattitudes, the Lord's Prayer, Hosea 6.6, Micah 6.6-8, Psalm 51.16-17, Isaiah 66.2b-4a, etc.)