Before psychology, and still concurrent with it, the need to help people with their behavior-change endeavors, mental health concerns, and other problems in living was met by the world’s great religions. For many people religions still serve this purpose, often outside the Western scientific view that considers them unfalsifiable and therefore irrelevant. This scientific myopia means that psychology has a limited perspective on behavior-change practices of religious derivation -- since the time of William James's Varieties of Religious Experience , religion hasn't been considered a respectable area of study. (Interestingly, we have better data about non-Western practices like yoga and meditation, which have been studied in ways cut off from their religious origins. It is mainly Christianity that was seen as outside the purview of scientific comment). One traditional practice common to many religions is the pilgrimage , a journey from home to a distant location in order to view...