This is a great one from White Stones.
Unusual in that it has a slice of a real conversation that Prynne himself might have had. He picks up a man hitchhiking from the hospital where it seems he's left behind a (presumably) dying loved one. He puts his foot in it, asking if he expects her back soon - the answer is no. "I draw blood whenever I open my stupid mouth".
I think it's about sympathy, the unbridgeable gap between yourself and another's pain. He hopes for a time of accord, when we can understand and comfort one another, but the accord is "cheap". The imagery is biblical - stigmata, nails, 'Abel' - and violent - choking, armies, wounds.
And there's that pesky word 'quality' again...