This paper aims to explore the Christian spiritual dimension of healing in the psychological therapeutic process. We started our approach with a parallel analysis of what mental suffering and spiritual suffering mean. Then, we brought into view a series of questions about the optimal way to treat mental illness and the specific methods of each field (psychology and religion) to deal with the needs of a mentally ill person. The paper discusses the weak points and strong points of each of the two ways and concludes that the two approaches are not mutually exclusive, but must represent a continuum from which the one who benefits is the patient.