|Preach to the choir|
|Crux of the matter|
|Speak of the devil|
|An act of faith|
Although a former governor of Oklahoma once claimed that a Higher Power could be something as corporeal as a tree and members of AA cite other Higher Powers such as doorknobs, closet doors, and toilet seats, numerous U.S. court rulings have held that it is definitely a religious term referring to a supernatural entity, and thus it is unconstitutional to force convicts to attend AA meetings.
In this vein, it sees use as a code word by Christians who are trying to be "inclusive" or deceptive and thus refrain from saying which Higher Power they mean; however, although these people may sing the praises of "a relationship with a Higher Power," they are not exceedingly enthusiastic about relationships with a certain other Higher Power.