To fully understand the part a religion plays in the life of an individual or a community, I would suggest that we need to examine it from several different points of view, only some of which can be addressed by observing a visible religious activity.
Using Ninian Smart's 'dimensional model' as a starting point, we can examine the different dimensions of a religion and discover how much insight into each of them the observation of a visible religious activity would allow, and consider other means of gathering the information needed to gain a full and rounded understanding of the role of a…