Edited from page 206 of A Geography of Consciousness, by William Arkle, 1974.
Metaphysics refers to our basic understanding of reality - the structure or pattern of reality. The earliest philosopher in Ancient Greek were metaphysicians; as they tried to understand whether reality was fundamental static, or changing and how these were related; whether it was ultimately water, air, fire and so on.
Historical Christianity mostly inherited its various metaphysics from the Classical Greek and Roman world; but there was another and very different understanding basic reality that came from the Ancient Hebrews - of reality as primarily about human relationships and specifically family relationships.
So there are writings of God as a Father to the Nation of the Jews in the Old Testament - and the language of the New Testament has multiple references to Christ as Son of God or Son of Man; and to Men as Sons of Gods, heirs, adopted by God and so forth.
Probably, most intellectual Christians over the past two millenia have regarded the theological language of Classic Metaphysics as 'True'' descriptions of reality (although there have been strong disputes within that traditions - between especially between Platonists such as Augustine of Hippo and Aristotelians such as Aquinas). By contrast the language of human relationships has been regarded as not literally true but metaphorical, illustrative.
For example, Jesus Christ has generally been conceptualized in abstract philosphical terms, such as the language of the Athanasian Creed:
we worship one God in Trinity, and Trinity in Unity; Neither confounding the Persons: nor dividing the Substance. For there is one Person of the Father, another of the Son: and another of the Holy Ghost. But the Godhead of the Father, of the Son, and of the Holy Ghost, is all one: the Glory equal, the Majesty co-eternal. Such as the Father is, such is the Son: and such is the Holy Ghost. The Father uncreate, the Son uncreate: and the Holy Ghost uncreate. The Father incomprehensible, the Son incomprehensible: and the Holy Ghost incomprehensible. The Father eternal, the Son eternal: and the Holy Ghost eternal. And yet they are not three eternals: but one eternal. As also there are not three incomprehensibles, nor three uncreated: but one uncreated, and one incomprehensible.
This is typical of the abstract philosophical discourse of Classical metaphysics, and this metaphysical style has generally been regarded by theologians as literally true as a description of reality -- indeed mandatorily true, dogma, an article of faith when incororated in creeds and confessions. The philosophical dogmas of Christiology and the Trinity are often taken to define Christianity. By contrast, the language of human relationships - of Family, Fathers, Sons and the 'interpersonal' idea of Love etc - has been regarded as symbolic, metaphorical, illustrative, optional.
But there has always existed an alternative possibility within Christianity, which is to regard the Hebrew discourse of human relationships as being literally true (i.e. as true as we are capable of knowing); and the language of Classical Philosophy as illustrative, symbolic and secondary. This discourse is one which regards ultimate reality as being best captured by the language of family.
This is what I mean by the Metaphysics of Family - the idea that discourse of family is the best, primary, most literally true way of conceptualizing ultimate reality.
The Metaphysics of The Family therefore does not explain the basic and fundamental structure of reality in terns of stasis, change, forms, the nature of Time and eternity, identity, properties (such as omniscience and omnipotence) -- But instead reality is conceptualised in abstracted ideal terms derived-from the type of relationship characteristic of Family: the reality and distinctness of men and women, parents and children, marriage and procreation, and the structural primacy of loving relationships.
I am, of course, talking here about the (often implicit) metaphysical theology associated with Mormonism and 'the Restoration' -- and emphasising how on the one hand it represents a massive departure from the tradition of intellectual and philosophical theology going back to Greek and Roman times; and how on the other hand it is an abstract and systematic crystallisation of what has probably been the mainstream and most common understanding of Christianity among ordinary, simple people whose conceptualisation derived from the abundant Biblical discourse of family relationships.
I personally find the Metaphysics of The Family to be a deep, revealed truth of reality.
For me, 'The Family' is therefore not merely an important moral value (e.g. 'family values' which Christians might promote as one of several moral values); but the fundamental principle that holds within it nothing less than the secret of the underlying pattern of the whole of the manifested universe.