The Lord would have His messengers guard sacredly their health and strength. They are not to sacrifice their God-given organs by misusing them. One organ is not to be overstrained, made to bear a burden of abuse that will bring disease and cut short the usefulness of the workers. (VSS 262.1) MC VC

The Lord would have you improve in speech by placing the burden where it belongs, upon the muscles of the chest and abdomen. The throat is only the channel for the words. Speak slowly and breathe deeply. This will enable you to throw out your words with distinctness and volume, while the throat and lungs, instead of being injured, will be strengthened to resist consumptive tendencies. (VSS 262.2) MC VC

It is your privilege to take lessons in voice culture, if possible. Voice culture is a study that should find a place in every institution for the education of the youth. Especially is this study essential for those who are preparing themselves to labor as teachers or ministers. In every study the importance of speaking slowly and distinctly, and of placing the burden upon the muscles of the abdomen, should be made prominent. This line of work should be made a specialty in every school. The students should be taught to stand straight, to breathe deeply, and to give the proper emphasis to important words and sentences ∙∙∙ . (VSS 262.3) MC VC