Though worship is edifying to the believer, it also is something which he renders to God, something which God Himself desires. Worship can take place, of course, outside the assembly of believers privately, but worship is also a corporate thing. In the Old Testament, worship involved formal acts of praise, singing, instrumental music, and recitations of praise in a formal manner as seen in the Psalms. Such forms of worship are not as obvious or explicit in the New Testament's description of the early believers' meetings, but it is certain that they used them. Thus, there have developed more ritualistic churches with elaborate liturgies, while others have avoided some of the more formal rituals.
Few clues are available.
Most ideas of liturgy come from tradition, but this fact must not necessarily be discounted, because early tradition may often reflect the apostolic age when little detail of apostolic liturgy is available.