The Bible is premised on the relationship of God and his creation, specifically God and mankind, where the relationship is personal: that is, as between persons.
For the relationship to substantiated as real, it has to have a real basis; a point of connection. For example, the marriage relationship for Christians, is given a basis in reality in the wedding ceremony, where a covenental connection between man and woman is made.
A parallel to this is the connection that God demonstrates with his creation in the creation account in Genesis 1-2 (and 3 for that matter, to give in a soteriological fulsomness). The link between the two is not just asserted, but shown. Shown in terms that are part of the fabric of reality between God and humanity (the fabric created by God, which is part of the substance of the account). In both participating in the shared fabric, we and God are shown to be sharing an ontological domain that makes sense of communion (relational concourse), expectations, relationship and covenant.
If the words of the account have no connection with the reality they assert to recount (that is the account means other than it specifically states, and sets out its propositional content only to infer a vaguely stated 'real' on the basis of a clearly stated non-real) then the intersection of our and God's being is not validly given and there is no indication of joint participation in a shared domain, or 'fabric'. That is, the parameters that would show the participation are invalid. If this were so, then the creation account would be meaningless, and convey no content that was propositionally fruitful: it would tell us nothing and undercut the notion that there was a basis for our connection with God.
If God could not tell us the basis in meaningful propositions, then it would be fair to think that there was no basis in the reality that would put God and us into relationship.
