Hardwired for Faith
Many police trainers point to faith as essential to police work. That pronouncement usually comes with some statement that it doesn't matter what you believe in, just believe in something.
The majority of cops will nod in agreement, but it doesn't make everyone happy. People who are confident in their own religious faith often find that kind of statement disheartening because their faith teaches them that there is Truth that transcends the general concept of "faith in something, no matter what". Those who have no belief in a benevolent supernatural power, whether that be an outright hostility to the thought, a benign indifference, or an active disbelief, are troubled at the accusation that they are less of a cop. As it turns out, there are some atheists in foxholes.
From my perspective as an evangelical Christian, I see efficacy in any of the following perspectives on faith: faith in one's self, faith in an ideal potential, faith expressed in iconography, faith in a religious system, and faith in a personal God. I contend that everyone in law enforcement does, indeed, rely on one or more of these.
For the purpose of this article, I base my argument on science, not theology. Research on the mind-body connection (as if they were ever disconnected in the first place) yields some interesting findings. One is that perception affects behavior. Expectations are self-fulfilling, not because of some karmic influence, but because it engages brain chemistry as well as behavior templates that are already established from life experience.
Thinking about a previous success improves job interviews. Standing tall increases perceptions of authority attributed to you by others. Clenching a pencil in the mouth, thus forcing the "smile" muscles to work, actually creates changes reflected in optimistic behavior of research subjects.
Other recent research shows actual changes in the brain - not merely ephemeral thoughts - under the influence of meditation. And we all know the calming effect of combat breathing that results in both physiology and emotion. We also accept that positive self-talk affects our behavior.
Sociological studies show marked benefits in health, success, and longevity among those with a religious practice and supportive faith groups. Similar benefits accrue from any positive group affiliation.
My non-religious colleagues find that a locus of control centered on their own competence, drive, and purpose is quite powerful and sufficient to sustain them in their profession. Those who have a religion other than one based on Judeo-Christian tradition gain strength from their practices as well. Even mere superstitions can sustain us for a time. That is not incompatible with the beliefs of my evangelical Christian colleagues who would agree with me that God offers common grace to all, blesses the efforts of the peace officer for the common good, and has divinely designed a magnificent brain to operate within human free will. God, as we understand Him, does not deny His benefits beyond the fold.
Whether what you believe brings you ultimate, transcendent peace or fits you for heaven is quite another discussion (one I'd be happy to have with you). As to the question of whether faith in SOMETHING is essential, the science of the matter says we're wired for it. And that is something we can all believe.