William's one-way communications with God are somewhat of a theme during the series, implying that his faith plays an important role in his sobriety.
However, whether all the scenes where Banks is shown praying out loud to God are real or whether they are simply illustrations of what is going on in his mind, are left ambiguous to the viewers.
His success at cleaning people's addictions has gained him the respect of the LAPD and other officials, who almost always turn a blind eye to the vigilante's methods.
In fact, the LAPD and other law officials will frequently refer clients to Banks.
Only then does William realize that the FBI agent lied to him: the man is not only her ex-partner, but the father of her unborn child--and a pawn in a larger power struggle within the FBI.