Shall the Words Cause Sunshine or Shadow?
It is important that children and youth should be trained to guard their words and deeds; for their course of action causes sunshine or shadow, not only in their own home, but also with all with whom they come in contact.
Unhappiness is often caused by an unwise use of the talent of speech. The word of God does not authorize anyone to speak harshly, thereby creating disagreeable feelings and unhappiness in the family. The other members of the family lose their respect for the one who speaks thus, when if he would restrain his feelings, he might win the confidence and affection of all.
Adventist Home, Chapter 71, Pg 437
Psalm 64:3 KJV
3 Who whet their tongue like a sword, and bend their bows to shoot their arrows, even bitter words:
Psalm 19:14 KJV
14 Let the words of my mouth, and the meditation of my heart, be acceptable in thy sight, O Lord, my strength, and my redeemer.