These are actually two different questions and two different answers, albeight interrelated. The first is a matter of rationality, the second is a matter of spirit. If you sincerely wish to know, I'll explain in brief detail a high level understanding for you.
In the
first, rationality, believing literally stories that say things like the rainbow was put into the sky as a reminder to God that he won't flood the earth again, is clearly, undeniably mythology (Gen 9:13-16). At one time before people understood cause and effect relationships in the world, which modern science excels in investigating, that was an explanation for natural phenomena which people just accepted, like the story of the Tower of Babble to explain why languages exist, and so forth. Believing that literally in this day and age is not a good thing. To deny what science tells us about the natural world in order to hang on to the belief the Bible "explains" nature and such stories should be accepted over science, is anti-rational, irrationality, and subsequently harmful to a spiritual life which by definition integrates the mind.
But understanding it is mythology does not mean it's "crap" and you need to dismiss and reject it as "false" or "a lie" or other such binary, black and white thinking conclusions. Not at all. Mythology contains truths of one kind or another within them, even for those who took them literally back in the day as they stood as 'placeholders' to explain the natural world. The myth of Adam and Eve in the Garden of Eden is a
wonderful myth! I don't have to accept it rationally as literally how the human species came into being in order to find truth within its storyline! In fact, there are great many truths within it, even though such persons and such a garden never literally existed.
Arguments to defend the "It has to be true or it's a lie", binary-mind conclusions, citing that "Jesus believed it because he spoke of them literally", don't fly. I cite Adam and Eve all the time to make a point in discussions, or for myself as a great story which speaks of the human condition, without me literally believing in them as factual humans in factual history. But even if he did literally believe they we part of actual history, that doesn't mean anything. Jesus was fully human, right? That means he was fully part of his culture too. That means how they thought about history and the natural world would be how he thought about it. I accept he was fully divine also. But that does not override being fully human!
The problem is people's ideas about what being divine means. It doesn't mean Jesus would have had supernatural scientific knowledge!
The divine mind, and the rational mind are different things. In order to accept Jesus was fully human, you also have to accept he was a fallible product of his own culture. I'll bet he would even make mistakes on a math test, had they had them, just like us!
You see my point?
So all of that is the rational thinking mind. I can take into account all that modern research reveals and mentally understand scripture in light of this. But here's where the
second part comes in: Spirit.
The "jewels" of scripture which I mentioned is referencing what I call them when in a place of being open in communion with Spirit in meditative states (meditation really is best described as a "state", rather than a practice). In such a state or condition of mind and spirit, various verses I have known throughout the years will arise to me in light of the moment in meditation, sparkling with meaning and depth previously unrealized. This happens all the time to me. This is very different than philosophically, rationally pondering the meaning of something to penetrate it (which is what you mistakenly understand as 'biblical meditation').
What I am describing is a certain illumination upon things in scripture, which the mind in its "normal" state cannot see, for simple reason it is embedded in its own ideas and its gaze is upon those. When you relax those processes of "thinking about" something, it opens to seeing things beyond your thoughts and ideas about them. This is very, very hard to describe to someone who has only ever known the thinking mind itself as the only mode of awareness. But it is quite true there are other ways of seeing and knowing beyond the thinking mind. It's actually all very natural, even if utterly foreign in experience to someone.
Now, to clarify for your benefit and avoid such an argument as I anticipate, this illumination of Spirit upon our understanding of scripture, or anything else for that matter, is NOT absolute and infallible! Questions of infallibility are irrelevant, as "truth" and "fact" are two different things. Think of it like the rays of the sun hitting a diamond laying in the sand. Depending on the angle of the sun, or your position relative to the diamond, different refractions of light will illuminate it to your perceiving mind. It takes on new colors and depths, depending on the angle and many other variables. One time you see beautiful blues, another stunning reds, another cooling yellows, and so forth. One doesn't argue which call is true and which is false. It is all colors which Spirit exposes in objects we see.
Spirit, like the sun, is the Source of illumination of the mind. And when we meditate, put ourselves into a place in order for the Sun to shine upon us, it is like stepping outside of the 4 walls and roof over your head into the daylight. If you look at a diamond in a dimly lit room, you may see some beauty in what little light penetrates its room, but when you move the diamond outside into daylight, many, many more refractions of Beauty are seen and understood.
So tying to two together, my rational reasoning mind becomes informed by what I am opened to spiritually, and what I see rationally becomes an object which becomes illuminated by Spirit, in which I am able to penetrate the depth of Spirit more
fully. These things inform one another, in their own light source, and together they create a richer, deeper, and fuller experience of life as a spiritual person. I can certainly go much deeper in explaining this, but this is about the minimum I would need to say to begin to answer your question.
Well, again, I do not equate "myth" with falsehood. Myth is a non-factual vehicle of language to convey truths. I never use the word to say "a lie".
I would say to the above verse that it can be understood to have meaning, when read in a larger context that includes things like understanding how the human mind thinks and understanding the processes of spiritual growth and awakening. This is a "rational" understanding I could have of it, and in a sense there is in fact a spiritual jewel in there, but how I see it is coming more from my own effort of trying to understand it with the mind, as well as to some extent the heart in there too. It's not something that arose to me in a deeper meditative state. I had to think about it just now for a little bit first.
What I hear it is that the people who heard the woman speak of Jesus responded with faith to her words, hearing and paying heed to what their hearts were informing them of (something you say we should never trust). They responded in faith, listening to the hearts, but then when they had an experience of Jesus directly, firsthand, not-secondhand, then their faith became transformed through experience into knowing. This is the difference between being taught about God, and actually experiencing God. The two are related, but of entirely different orders of magnitude and impact on their lives. In other words, it tells you should go meet Jesus firsthand, through mystical experience, through Spirit, and move from simply believing the Bible, the woman's words, fallible as they were, take that faith and move into Awareness of Spirit, stepping out of the house, trusting the heart, and let Life itself illuminate what you cannot see hiding inside.