An semi-anonymous commenter at TitusOneNine who goes by "mig+" (the plus sign usually signifies that s/he is a priest) offers a thought-provoking metaphor for the Summary of the Law, about which I've written here before:
Since Jesus says there are two commandments from which the divine guidance hangs, I suppose Jesus imagined the Law and the Prophets as a door pivoting on two hinges.
Formerly I was a cabinetmaker and I can tell you it doesn’t make much difference whether a top or bottom hinge is broken. Either way the door won’t work (show the way).
I think the point Jesus was making is that love of God and love of neighbor are inseparable.
(Extra paragraphing added.)