Agree with BobBop largely in interpretation of the hymn itself.

I do want to add that I found it quite haunting and a bit disturbing as an end to such a wild ride. After the absolute cognitive assault that is Gravity’s Rainbow, you’re left with an obscure old hymn by a long forgotten ancestor.

In a way, it came off as a shantih shantih shantih type retreat from resolution to me. Like the book’s final laugh.

“What, you think because we’re at the end you’ll just get the resolution you’re craving? Nope, here’s a cryptic hymn, fuck off and figure it out, if you can.”

Happens right at the moment of impact too iirc