I found many pictures online similar to this, and this idea really stood out to me as a connection to the metal element. It has an obvious breathing component to it, but it also shows the breath going deeper into the body than just the physical lungs. This means that the breath is not just air, but it is energy that is spread throughout the body. The peacefulness of being alone is symbolic to the fact that we alone have control over our energy, life, and healing.