Today we have the New Testament admonition from the writings of the apostle, Paul. He wrote in Colossians 3:16, "Let the word of Christ dwell in you richly in all wisdom, teaching and admonishing one another in psalms and hymns and spiritual songs, singing with grace in your hearts to the Lord".
This is really quite self-explainatory, but for some reason many Christians overlook this life-changing practice. Here we can clearly see that God wants His children to use the God-given gift of music for teaching His word, and admonishing each other to let His word dwell in us richly. Notice it does not say "Let the word of Christ dwell in you casually", LIKE SO MANY PEOPLE ATTEMPT TO DO. Richly means aboundantly and singing His word to ourselves and to each other is a wonderful way to accomplish this.
Wow! What a concept!