The passage shows how powerful music can be when used effectively for the right purpose and at the right time. When the temple of the Lord was completed and due for dedication, all the priests were assembled for their normal temple duties. It states that the singers, being arrayed in white linen, having musical instruments, stood at the east end of the altar, and with them a hundred and twenty priests sounding with trumpets.
The 13th and 14th verses make it more interesting, it says, “It came even to pass, as the trumpeters and singers were as one, to make one sound to be heard in praising and thanking the Lord, and when they lifted up their voice with trumpets and cymbals and instruments of music and praised the Lord, saying, for He is good; for His mercy endures forever: that then the house was filled with a cloud, even the house of the Lord; so that the priests could not stand to minister by reason of the cloud: for the glory of the Lord had filled the house of God.
The singers and instrumentalists brought down the cloud of glory of the Lord to fill the temple and 1 Corinthians 3:16 says that we are the temple of God, and the Spirit of God dwells in us.
When you sing rightly, God’s glory will overshadow you and you will be filled with so much power, and grace from the throne room of God. Your life will be full of God’s anointing and authority such that the aura around you should be able to bring a sinner to Jesus, heal the sick and set the captives free.
Your continual act of singing the right songs will make you a powerful child of God, full of God’s grace and glory because the Godhead will fill you.