In other words it is a tool for taking three factors, unifying them and creating a oneness out of all three.  Perhaps the most general and inclusive example of this is:

[ (Love x Grace)  <->  Wisdom ]

You could also make that

[ (Love x Grace)  <->  God ]

You could go further and make a Trinity-Unity-Oneness  (TUO) out of the integration of that Duality:

[ [ (Love x Grace)  <->  God ]  x  [ (Love x Grace)  <->  Wisdom ]  <->  Cosmos/microcosm x macrocosm ]