One of my favorite biblical scholars and theologians, N. T. Wright has explained scripture in terms of a five part story:
I would like to add a sixth part which would would have to do with Jesus’s return, sometimes called the Second Coming, and maybe a seventh part could be added (to make it seven parts in all?) which would have to do with the final outcome, the eternal state.
To understand any part of scripture, one needs to see it in context, its immediate context, certainly, but also in the context of the whole, the entire Bible and witness of scripture.
I am leery of simply writing off any scripture as completely irrelevant for us today, since the New Testament, including the letters written to the churches clearly suggest otherwise. At the same time, we obviously don’t read the story well when we read it in what has been called a flat way, as if all of it has precisely the same application as when it was written. For example the rules in Leviticus 14 about mold in homes certainly do no apply in the same way for us today.
The cross, Jesus’s death is certainly a “game changer”, but what leads up to it does impact what follows. For our application today, we may need to especially emphasize what follows, but to understand that well, we need to see what preceded it. There is so much here that Christians don’t quite see or apply in the same way. But it’s a grave mistake on the one hand to think for example that the gospel accounts: Matthew, Mark, Luke and John don’t have profound meaning for our understanding of the faith today, and even how we understand the letters written to the churches. Jesus was speaking mainly to Israel, but he was pointing out to them just what kind of kingdom he was bringing, certainly clearly anticipating what was to follow. On the other hand, it’s also a grave mistake to think that the cross in Jesus’s death did not make a profound difference in what followed: no less than the beginning of the new covenant of course in Jesus’s blood.
We have to keep working at, which means taking it all seriously, but seeing it in the context of the whole. The fulfillment coming, of course, in and through Jesus and through his death, the resurrection following.