A recent study found that one need not be religious to experience the calming effect of prayer, especially in controlling anger.

Psychology professor Brad Bushman of Ohio State University, who led the research, found that praying for somebody in trouble had a better effect than simply praying for someone.
Prof Bushman said: “We found that prayer really can help people cope with their anger, probably by helping them change how they view the events that angered them and helping them take it less personally.”
Source-Medindia