Here is an offbeat observation of real life imitating Scripture at a physical level: Lactose intolerance is standard as people mature unless it is removed by adverse conditions.

In Northern Europe over many generations the gene that normally activates lactose intolerance was removed by natural selection due to the dependence on cow’s milk in the colder climates. Hence the fact that all major races except Caucasians (and some East Africans) are lactose intolerant after breastfeeding age.

So it is natural to mature beyond milk at least in the physical.

Is the western dependence on spiritual milk among Christians with years of a Christian walk likewise evolved and unnatural?