"We may have knowledge, but unless the habit is acquired of using the voice correctly, our work will be a failure. Unless we can clothe our ideas in appropriate language, of what avail is our education? Knowledge will be of little value to us unless we cultivate the talent of speech; but it is a wonderful power when combined with the ability to speak wise, helpful words, and to speak them in a way that will command attention. CT 217.1"
"Death and life are in the power of the tongue: and they that love it shall eat the fruit thereof."
Both passages highlight the power of speech. Proverbs 18:21 speaks of the life-and-death power of the tongue, while EGW emphasizes the importance of correct and effective communication. The connection is thematic and strong.
"Let all guard against becoming annoyed in spirit because they have to be drilled in these common branches. It should be impressed upon students that they will themselves be educators of others, and for this reason they should strive earnestly to improve. CT 217.2"
"Meditate upon these things; give thyself wholly to them; that thy profiting may appear to all."
The EGW passage encourages diligence in learning, as students will become educators. This aligns with 1 Timothy 4:15, which urges dedication to personal growth so that progress is evident to all. The principle of diligent self-improvement for the benefit of others is shared.