I have been involved in work around spirituality in the healthcare context and it is really difficult to define. It's not just about religion, it's about seeing the patient as a whole person and providing holistic care meeting the whole needs of that person (which is culturally and religiously appropriate if necessary). Spirituality is the opposite of materialism so it is, as it were, caring for the soul (or inner man/woman if you are not religious) and living by a set of values - being happy in your own skin can be a sort of spirituality. It is very hard to define it exactly!