In Traditional Oriental Medicine the Lungs govern Qi and respiration. They’re responsible for inhaling Qi from the atmosphere, combining it with the Qi received from food and spreading the resultant useable Qi throughout the entire body. The Lungs are called the tender organ because they are the most external organs and they connect the body to the outside world. The Lungs are easily attacked by external pathogenic factors, in this case smoky, ashy, hot air. When the air we’re taking in is poor quality, we tire easily. Of course, when we’re breathing fine air and eating garbage we get tired easily, but that’s another discussion.
The aim of every artist is to arrest motion, which is life, by artificial means and hold it fixed so that a hundred years later, when a stranger looks at it, it moves again since it is life. Since man is mortal, the only immortality possible for him is to leave something behind him that is immortal since it will always move. This is the artist's way of scribbling 'Kilroy was here' on the wall of the final and irrevocable oblivion through which he must someday pass.