David identified himself with the people in worship.
v 15. So David and all the people of Israel brought up the Ark of the Lord with shouts of joy and the blowing of rams’ horns.
No hiding David’s religious fervour here! By this point in the story David had made Jerusalem his capital city. The Temple had not yet been built – that was a project for his son Solomon to carry forward – but David prepared the ground for it. This procession, bringing the Ark of the Covenant into Jerusalem, established the city as the seat of government and the place of worship. David is no mere onlooker for the event, he joins the people, celebrating it as he ‘danced before the Lord with all his might ‘ (v 14) Some of his family took exception to the manner of his participation, ‘When she saw King David leaping and dancing before the Lord, she was filled with contempt for him.’ (v 16) David entered into the occasion in a totally uninhibited fashion, but such religious enthusiasm is not always welcomed – even in our own day and age!
But what we see is a young King uniting his nation in worship. This was typical of David; the Psalm-Writer/Soldier who combined military prowess with spirituality in his public life.
It is this idea of expressing worship in the public domain that many leaders fight shy of these days when religion is perceived as being a private concern. But it matters for ordinary people too; being a Christian is not just in inner conviction, we are called to live it out in the arena of daily life. Jesus put it this way ‘“You are the light of the world—like a city on a hilltop that cannot be hidden. No one lights a lamp and then puts it under a basket. Instead, a lamp is placed on a stand, where it gives light to everyone in the house. In the same way, let your good deeds shine out for all to see, so that everyone will praise your heavenly Father. ‘
(Matthew 5:14) Following Jesus begins in the heart but then gets worked out in both worship and daily life for all to see.