Restoration of the music God wanted in worship. Since all the evils brought in by wicked kings before him had caused God's appointed worship to fall into disuse, Hezekiah restored all the aspects of worship the Lord had prescribed. Music in New Testament worship is quite different. There could not be acceptable worship under the Law of Moses with the instruments of music which God commanded through his prophets. About fourteen passages in the New Testament talk of singing in worship.
None speaks of instrumental music in the worship of the church.
In the New Testament we find the Lord's supper. As Josiah did, we must remove all idols and images that corrupt the worship of God. To purify the temple of God now his own worshippers must return to the New Testament pattern for our instruction and examples. This shows that the doctrines taught and the practices followed were meant to be the same in every local congregation of believers. When different denominations were begun long after the days of the apostles, each denomination would adopt its own creed and its own forms of worship.