"There is power in the ministry of song. Students who have learned to sing sweet gospel songs with melody and distinctness can do much good as singing evangelists. They will find many opportunities to use the talent that God has given them in carrying melody and sunshine into many lonely places darkened by sorrow and affliction, singing to those who seldom have church privileges. CT 547.3"
"Speaking to yourselves in psalms and hymns and spiritual songs, singing and making melody in your heart to the Lord;"
The passage speaks of singing gospel songs to bring sunshine and melody, which aligns with the encouragement to speak to one another in psalms, hymns, and spiritual songs.