Not bad for a Wednesday puzzle. But looking at the date, it’s crazy that we’re almost 1/3 of the way done with December.

I pulled out 14D Source of the line “Blessed are the meek: for they shall inherit the earth”: MATTHEW because that’s my name. Nothing beyond that. Just vanity.
I didn’t use the theme of this puzzle to get me any answers. The theme makes sense in retrospect.
19A Establish a standard that’s easy to reach: SETTHEBARLOW.
30A With 41-Across, make every effort to be accommodating: BENDOVER.
41A See 30-Across: BACKWARD.
51A Not meet expectations: UNDERACHIEVE.
64A Contest described by 19-, 30-/41- and 51-Across: LIMBO.
You set the bar low in limbo. You approach the bar as you bend over backward to comply with the rules. If you are successful, you achieve by going under.
Not bad.
Finished this one in 13:01.