While religion and spirituality are generally taboo topics in medicine and sport, research into them is taking place and their effects being monitored. Larimore et al 2002 completed a literature review on the use of positive spirituality interventions with normal treatment. They conclude that there is a positive correlation between mental and physical health, most patients will use some form of spiritual treatment when offered and will censure clinicians for ignoring these needs, most clinicians have little training in this area, and that most clinicians who receive training implement it immediately and find it useful.
At this time, one can not conclude if positive spiritual interventions help in treatment or recovery but since no negative correlation can be found and it is correlated with a healthy mind set (which is correlated with a healthy body), it should be an option available to patients should they desire it.
Take home, addressing the whole patient is really the deal and likely has a big impact on healing.