Viv;...All made possible by the air we breathe, is a statement, it is NOT trying to identify the type of spirit as in gods, demons etc, but rather identfies the ancient concept of the physical air which without we would not be able to communicate as we are now doing, with great spirit I might add.
Nothing mystical about it and certainly not a metaphor.spirit and air we breathe in the context as I have described are the SAME thing, we just don't use it in modern times in our conversation, as in times past when the air we breathe was also known as spirit being the physical force which was seen(rightly) to sustain our life.
Am I right in believing the spirit you are trying to identify is of the supernatural kind? As I have said previously I don't believe there is such a thing.
Best wishes.