Chances are that you didn’t connect singing and warfare together, but it’s a theme visible in Scripture. In Colossians 3, Paul is challenging the Colossians to literally put sin to death in their lives – to kill sin. And so all the commands to love and peace and forgiveness and teaching and SINGING, are therefore, the Bible is teaching, attitudes and habits of the believer that will kill sin!
We see the same thing in Ephesians 5, the command to address one another in song comes right on the heels of “[make] the best use of the time, because the days are evil” (Ephesians 5:16).
And the more you think about this, it makes total sense: What posture must be more hated by the evil one than the posture of a believer who is singing? I can’t think of many stances you can take that identifies you with Christ and against Satan more than eyes, heart, mind and voice lifted to heaven in song!
It’s very hard to lie, be greedy or to look at something inappropriate when, you’re “singing and making melody to the Lord with your heart” (Ephesians 5:19). Simply, a heart that’s doing that will not easily give in to temptation.A singing heart is a heart at war with the work of the evil one and the power of sin.