Ah this is a good catch! I think "higher power" would fit way better given how I framed this sentence. Ennet's members aren't surrendering to substance (they've already done that). Like you said, once in the halfway house, they're surrendering to the "higher power". AA groups, as the book covers, are conspicuously religious, and I know a lot of the AA passages were informed by DFW's research at AA meetings and his own experience in recovery. I'm going to change this line.