Fire and Water are the yang/yin of being/flow/process
Air and Earth are the yang/yin of relationship/solidity/product
in the glyphs themselves, Air and Earth look like Fire and Water (Triangles) with a horizontal line dividing them in the center — this divide is what i consider to be the mark of ratio/relationship/rationality.
it is the left side where i believe Love resides and on the right Wisdom. Love as action(Fire) of the individual(I) with connection(Water) to the collective(All).
the young or growing yin/yang of Love produces an old or mature product yin/yang of Wisdom — which evolves the process to a new level of harmonious complexity.
as in a sine wave, the peaks of the wave are the dots in the taijitu and the movement towards those peaks are the swirls. these peaks, these ridges, these are the divides of Love — the wise break between individuated action and connected reception.
perhaps this is not exactly what you mean by A Love Divide, but i thought i'd offer a possible explanation using the Elemental Method — a device that when used with Love produces Wisdom for greater Love for greater Wisdom for..