In his masterful book What Coleridge Thought (1971), Owen Barfield identified Polarity - or Polar Logic - as ST Coleridge's core philosophical concept; and the key to understanding his completion of Romanticism.
I read this book twice, with deep attention, and was convinced by it; however, when I came to try and use the concept of polarity in my everyday life, with the aim of transforming my life for the better - I couldn't. Polarity was just too abstract.
This is probably unsurprising - after all a system of logic is not really the kind of thing which is fundamental; it is more of a tool than a basis for existence. The cognitive domain 'logic' is, indeed of interest to only a tiny minority of very specialised people who have had systematic training.
Furthermore, my experience has been that Christianity ought not to be based upon abstractions, but upon the core analogy of Loving Family Relationships - this is both the reality and the master metaphor (or symbolism) of the Christian religion.
Therefore I need to re-express, re-explain, Polarity in anthropomorphic terms - to make it a matter of human and divine relationships.
Polarity is a way of conceptualising necessary and inseparable opposites: the core physical example (cited by Coleridge) is of a force that coheres and a force that disperses; centripetal (centre-seeking) and centrifugal (centre-fleeing) - the varied combinations of such polar forces then accounts of the dynamic nature of the world, and life.
I then saw that Love - which is the heart of Christianity - is of precisely this nature; because love is a cohesion, a holding together, as with marriage and family relationships; and love is an open-ended creative force, as with children being born, developing, and forging new relationships.
Love is dynamic: it cannot be just cohesion or it will die, it cannot be just expansion or it will die - it must be the polarity of both, which is infinite in its capacity for self-renewal and strength.
Love comes from the dyadic relationship of man and woman, husband and wife, in cohesive relation for eternity and also open-endedly reproducing, having children who have children. The relationships cohere forever, but in a state of continual change and interaction forever.
Love depends on distinction: one person from another, man from woman, parent from child, each sibling from another, each friend unique; and Love also depends on the constancy of the fact of relationship. Many loving relationships changing by an organic, unfolding development. But each relationship sustained in its core nature - husband and wife, father and son, mother and son, brother and brother and so forth.
There are all, in Coleridge's or Barfield's abstract sense, polarities: the insight is true and it is deep. Yet when expressed in terms of relationships it is simple common sense and everyday observation... all we need to do is recognise the ideal for which our earthly family relationships are striving; and then we can know the actuality which will (if we choose it) be the reality in Heaven.