A close friend of mine who is a Christian tells me that she has experienced a reduction of fear since becoming a believer. Due at least in part to her upbringing, she used to have an unreasonable fear of something happening to her (assault, robbery, murder, etc.) and nobody being around to help her. Since she has become a believer, that fear has subsided.
I have pointed out to her that she is getting that benefit from the belief, but that doesn't mean that the belief is correct. She's OK with that, and still believes.
Not to say that she might not have been able to get the same benefit from psychotherapy or some other means, but this is what did it for her.