Human and only human is an absolute creature with all materialistic and spiritual features. In His holy verses (Alhijr, 10) (
1) God recognizes human beyond the mere physicality by fashioning him from soil and then breathing His spirit into him. He puts upon his shoulder nothing but to serve Him (Zaryiat, 56) (
1) which in fact is a responsibility on manās spirituality through his physicality. Humanās spiritual and physical dimensions are interwoven in his creation and inseparable till death takes them apart. Motahari (
2) refers to this as spirituality and physicality inter-affecting one another. During the last two decades, there have been spiritual/religious interventions in cancer patients to prevent or treat a range of physical problems, including managing chronic pain, coping with the disease, boosting hope, increasing quality of life and mental health. Koenig (2012) showed, in his review, a fundamental change in studies related to spirituality and religion from 1971 to 2012 (e.g. from 2002 to 2012, the number of studies investigating various effects of spirituality on physical and mental dimensions was 7-fold those of the last 30 years) (
3). Spirituality is a universal keyword and representative of search for meaning, perfection and salvation (
4). Although societies are of different faiths and belief systems, what they all share is spirituality (
5). Of these, some do not differentiate between religion and spirituality, some differentiate the two, some recognize spirituality as part of religion and some others lean toward religion as the basis (
6-
12). Spirituality is often known in relation with their inner motivations and their emotional relationship with their god(s) (
13). While other societies have not yet reached a consensus on the common definition of spirituality (
14), Islamic sources have a clear definition for spirituality. To put it in Motahariās terminology, spirituality in view of Quran is the basis for perfection, and it is mostly faith in God and right deeds and behavior or in other words: serving God. In the main study, which is the first one of its kind in the world, conducted by the authors on these very principles, we managed to revive spiritual behaviors in a group of cancer patients leading to changes (the cell biological changes begin with changes in its genes) in their gene receptor expressions so much that genetic stress factors were controlled and the patients were able to experience significantly calmer and more peaceful (
15). This is due to the fact that, based on a literature review, with chronic stress, dopamine concentration increases leading to an inhibitory effect on T-cells which in turn expands cancer (
16).