How to Fill the Lungs
In practicising to fill the lungs, the singer should stand upright, close the mouth and inhale very slowly through the nose, whilst at the same time inducing a gradual upward expansion, as though the air descended first to the region of the abdomen and then mounted by degrees to the upper cavities of the chest.
The body throughout, although firmly supported, must be in a state of muscular relaxation.
During the act of inflation, the stomach must be slightly drawn in, the ribs raised to their full extent, and the front wall of the chest allowed to rise—all without any perceptible elevating movement of the shoulders or collarbone, which are not permitted to move from their normal position or take any active part in the process of expansion.
A noted pedagogue once told me: "You can't learn to sing from a book!" And while this is widely considered to be true, I didn't let that stop me. And if I had let it stop me, I never would have found Klein's book, a passage of which is included above.
What does it take to learn from a book? I believe it involves a high degree of proprioception—that is, the person reading must already have a feeling for singing. The book itself must be written from a procedural point of view. It must give clear, concise instruction in what to do and how to do it. Theory isn't enough. Knowledge about the vocal mechanism is not enough. There must be a doing to do.
Klein offers the reader a wonderful bit of doing two paragraphs after the two you see above when he tells the reader to hold the breath for three counts and then writes out—"to be actually counted."
If you go through the steps Klein has delineated and then hold your breath for three counts, well, by golly, you will feel something, a something that wants to be repeated. I can tell you what this is in one simple word: Lift. Acquiring it whether the mouth is closed or open is the next order of business.