James 5:13 says “Is anyone cheerful? He is to sing praises.”
When I read this, I ask one question: why? What is it about singing that seems to be the fulfillment of joy or cheer?
C.S. Lewis has a great answer:
But the most obvious fact about praise – whether of God or anything – strangely escaped me. I thought of it in terms of compliment, approval, or the giving of honor. I had never noticed that all enjoyment spontaneously overflows into praise…The world rings with praise – lovers praising their mistresses, readers their favorite poet, walkers praising the countryside, players praising their favorite game…My whole, more general difficulty about the praise of God depended on my absurdly denying to us, as regards the supremely Valuable, what we delight to do, what indeed we can’t help doing, about everything else we value. I think we delight to praise what we enjoy because the praise not merely expresses but completes the enjoyment; it is its appointed consummation. (C.S. Lewis, Reflections on the Psalms, page 94-95)
This, among many others, is a great reason why we should give ourselves to singing during worship with God’s people. Singing isn’t optional – it’s the way we express and complete our joy in Jesus. To not do this is wrong.