As soon as we have the tongue under control,—that is, have acquired the habit of forming a furrow,—we can use it confidently as a support for the breath and the tone, and for vowels.
On its incurving back it holds firmly the vowels; with its tip, many of the consonants. With all its elasticity, it must be trained to great strength and endurance.
I, for instance, after every syllable, at once jerk my tongue with tremendous power back to its normal position in singing; that is, with its tip below the front teeth and the base raised
That goes on constantly, as quick as a flash. At the same time my larynx takes such a position that the tongue cannot interfere with it, that is, press upon it. By quickly raising the tongue toward the back, it is taken out of the way of the larynx, and the mass of the tongue is cleared from the throat. In the middle range, where the tongue or the larynx might be too high or too low, the furrow, which is of so much importance, is formed, in order to lead the vocalized breath first against the front of the palate beneath the nose, then slowly along the nose and behind it. Then when the highest point (the peak, which is extremely extensible) is reached, the pillars of the fauces are lowered, in order to leave the way for the head tones to the head cavities entirely free. In doing this, the sides of the tongue are raised high. Every tongue should occupy only so much space as it can occupy without being a hindrance to the tone.
The bad, bad tongue! one is too thick, another too thin, a third too long, a fourth much too short.
Ladies and gentlemen, these are nothing but the excuses of the lazy!