In order to fully understand: it must be done through the lens of THEIR faith, not yours.
That's putting exegesis before eisegesis. Which is the fallacy of induction as so clearly laid out by Karl Popper.
So many of the errors that exist in the world in which we live, particularly our backwards theology, is based on people thinking they're functioning through the objectivity of induction (exegesis before eisegesis) when, as Popper shows, that never, ever, occurs in reality. We start with a presupposition, and that eisegetical presupposition is the lens through which we examine things.
The fairminded ladies say: But if that's true, then how could anyone ever see something incompatible with their presupposition? To which my response is for them to read Thomas Kuhn's,
The Structure of Scientific Revolutions.
Kuhn explains that when enough evidence piles up against the original presupposition, the observer doesn't change his mind (which would be inductive). On the contrary, his original prism shatters, creating a seriously chaotic event, not a natural, inductive, shift from one point of view to another, but an unruly conversion-experience. After the original prism or presupposition shatters under the weight of contrary evidence, a whole new epistemology must form, which is a painful and cognatively expensive conversion-experience, not a natural inductive shift.
I've personally noted the peculiar truism that when I study the writings of numerous Jewish rabbis who converted to Christianity after a previously deep faith in Jewish tradition, they never (or I should say very rarely), to my utter amazement, use their new faith as a lens to make sense of Jewish tradition in light of the new faith. Since enough evidence had to pile up high enough to shatter their previous epistemological prism (Judaism proper), true to form, they start fresh building up an entirely new foundation based on the Christian concepts that shattered their previous prism.
Unlike these rabbis who "converted" to Christianity (at the price of their former epistemological foundation), I haven't had my Jewish prism shattered during a conversion experience, such that I'm able to examine Jewish scripture through a speculum that's as intact anb shiny as it ever was. Which is to impy that based on the truth that iduction is always a farce, I'm able to examine Judaism through a Christian lens in a manner that no serious Jew, exempting that rare bird, can examine Judaism after converting to Christianity.
Finally, the kicker I believe makes my studies valuable. Traditional Judaism simply can't, or won't, conscience Christian ideas (divine incarnation, Messiah as divine man) etc. In traditional Judaism, Christianity's foundational belief is completely unacceptable. Which means the prism a Jew brings to Christian examination can't even examine Christianity quasi-objectively. On the other hand, Christianity takes the Jewish scriptures and retroactively reads Christ into the examination of the Tanakh. Which means a Christian can study the hell out of the Tanakh without putting much pressure on the prism used to do the study.
There's probably a sense in which the Christian's retroactive-exegesis is based directly on the fallacy of inductive logic. It's similar to the Jewish sages who concede that the narratives in the Tanakh, at least in their spiritual content, aren't chronological. The great Jewish sages are fully aware that the exegete can use Isaiah, and the Psalms, to retroactively make sense of the narratives in the Pentateuch. The historical narrative is naturally linear. But the spiritual content isn't asymmetrically linear. The transcendental signifier needed to fully understand the the spiritual content of the entire scripture can come hundreds of years after most of the books have already been canonized. That's a difficult pill for an exegete blinded by the fallacy of induction to swallow.
John