resentment, the number one offender
‘Resentment Is The #1 Offender’ is another Boston AA cliché Gately’d started to believe. That blame’s a shell-game.
Context
A doctrine-slogan shown in the act of being believed: watching the wraith blame the boy's mother and then drop it, Gately reaches for the cliché he has come to trust — that resentment is the disease's chief accomplice, that blame is a shell-game — even as he privately reserves a doorless room for Randy Lenz. The program's wisdom held and the ordinary human grudge held at once, which is exactly the honest, unfinished state the slogans are meant to work on.