"I will stand in this breach."

Said President Biden, in his speech yesterday. You can encounter the line in context at the end of my previous post. 

This post is to examine the idiom. What are we talking about when we say "stand in the breach"? I think of Shakespeare's "Once more unto the breach." It's about taking up a warlike frame of mind:

Once more unto the breach, dear friends, once more;
Or close the wall up with our English dead!
In peace there's nothing so becomes a man,
As modest stillness and humility;
But when the blast of war blows in our ears,
Then imitate the action of the tiger:
Stiffen the sinews, conjure up the blood...

So "the breach" is a broken open place in some fortifying wall, and the idea is to move through that space, into battle. If they don't move forward, the argument is that they will pile up dead until their bodies fill that space — close the wall up.

But that's about using the breach as an entry point into battle, not just standing there, which seems to be a poor military tactic.

From about the same time period, there is the King James Version of the Bible (1611), Psalm 106:23:

23 Therefore he said that he would destroy them, had not Moses his chosen stood before him in the breach, to turn away his wrath, lest he should destroy them.

There, "the breach" is the broken connection between God and human beings, and Moses was able to stand in that breach. To say "I will stand in this breach" — as Biden did — is to draw a parallel between yourself and Moses. Does Biden mean that the country is broken open with angry Trumpsters on one side and the rest of the people needing mediation that Biden, like Moses, can bring? It's a funny analogy, because not only is Biden a strange Moses, but because the nefarious insurrectionists are in the God position.

The Oxford English Dictionary has an entry for the phrase "to stand in the breach." One definition of "breach" is "The product of breaking... esp. 'A gap in a fortification made by a battery’ (Johnson). Hence to stand in the breach (often figurative)." The only example it gives of standing in the breach that Psalm (in the King James Version).

Searching a bit more, I see that there are some translations of the Bible that have the phrase "stand in the breach" in Ezekiel 22:30: "And I sought for a man among them who should build up the wall and stand in the breach before me for the land, that I should not destroy it, but I found none."

Trumpsters perk up at "a man among them who should build up the wall." 

That's as far as I'll go in this blog post. I have a problem with understanding "the breach" as a break in a wall, because I don't see the effectiveness of simply standing there. I think it ought to mean a division between groups of people and serving as a mediator.