Nicely put, ekim. One might add that whilst the breath is invisible to us, except on a very cold day, it is actually entirely physical/material (reminding us that things that appear subtle and intangible do not necessarily imply otherworldliness) and is a point of vital contact and interchange with our environment. When this relationship with the outside world stops we die. So although spirituality is often linked to 'seeking' it might more fundamentally be a word that refers to our essential relationship and connection with all that is without, and thus about the experience of being a self in a world of other and all the issues and implications that arise from this. Perhaps the most significant issue that arises is that of the experience of lack, which leads to searching for whatever it might be that appears to be missing. Because people are generally confused about what is missing they seek for different things in different ways, resulting in a wide variety of spiritual practices and beliefs, which is why the word spiritual can be so slippery and imprecise. And, of course, those who do not think of themselves as spiritual will equally be engaged in this process, even if their seeking is restricted to retail therapy or new and entertaining experiences. That's why I think we need to be careful of defining spirituality too narrowly and I'd suggest that it makes no more sense to think of only certain people as spiritual than it would to think of only certain people as having bodies. Spiritual life (whether we acknowledge it or not) is as innate to us as mental life or physical embodiment and the three are merely aspects of one thing.