The workman for God should make earnest efforts to become a representative of Christ, discarding all uncomely gestures and uncouth speech. He should endeavor to use correct language. There is a large class who are careless in the way they speak, yet by careful, painstaking attention these may become representatives of the truth. Every day they should make advancement. They should not detract from their usefulness and influence by cherishing defects of manner, tone, or language. Common, cheap expressions should be replaced by sound, pure words. By constant watchfulness and earnest discipline the Christian youth may keep his tongue from evil and his lips from speaking guile. CT 238.2
We should be careful not to give an incorrect pronunciation of our words. There are men among us who in theory know better than to use incorrect language, yet who in practice make frequent mistakes. The Lord would have us careful to do our best, making wise use of our faculties and opportunities. He has endowed men with gifts with which to bless and edify others; it is our duty so to educate ourselves that we may be fitted for the great work committed to us.... CT 238.3
In reading or in recitation the pronunciation should be clear. A nasal tone or an ungainly attitude should be at once corrected. Any lack of distinctness should be marked as defective. Many have allowed themselves to form the habit of speaking in a thick, indistinct way, as if their tongue were too large for their mouth. This habit has greatly hindered their usefulness. CT 239.1
If those who have defects in their manner of utterance will submit to criticism and correction, they may overcome these defects. They should perseveringly practice speaking in a low, distinct tone, exercising the abdominal muscles in deep breathing, and making the throat the channel of communication. Many speak in a rapid way and in a high, unnatural key. Such a practice will injure the throat and lungs. As a result of continual abuse, the weak, inflamed organs will become diseased, and consumption may result. CT 239.2