Breath is crucial for life. Physical respiration goes on as a largely unconscious process as the body exchanges oxygen and carbon dioxide to power the activities of every cell in our bodies. Deliberate deep breathing will ensure that we take in enough oxygen and can calm feelings of breathlessness or fear. Conscious breathing used as part of a spiritual practice focuses the mind's attention and helps relieve stress on our bodies.
What struck me most was the silence. It was a great silence, unlike any I have ever encountered on Earth, so vast and deep that I began to hear my own body... There were more stars in the sky than I expected. The sky was deep black, yet at the same time bright with sunlight. The Earth was small, light blue, and so touchingly alone, our home that must be defended like a holy relic.