One of the most powerful piece of knowledge I received during my first training with It's Yoga international was the fact that, in many languages, to take a breath in is translated to inspiration (Portuguese, French, Spanish...) which means to take the spirit-in. We take in our spirit into our physical vehicle with our very first breath and keep the flow going until we let out our last breath, espirar (Spanish) or expirer (French): spirit-out.
It is one of those realisations that changed my thinking forever, for it is simple yet, I had never thought about it. What a beautiful thought: I am truly not my body, I am my breath.