That's why the focus should be on the age-independent aspect of spiritual evolution.
I'm trying to understand what you mean by this, could you explain, sorry.
SI, I mean, given the social and historical context so much different from the present one, we should concentrate on the universal truths expressed by these prophets and ignore soem details related to that specific culture.
For example, St. Paul seems to extol slavery and submission of women in some of his writings. We should ignore that because those are remarks that can be understood and criticized only by knowing in the detail the cultural framework of that period.