Evangelists having planted and watered churches move on leaving the Reading of the Word and Singing the Biblical Text to members of the congregation. Campbell in this article does not include the Lord's Supper, which is clearly important, as a act . Rather, it is a remembering and teaching effort .
Internal worship has several outlets as it influences the individual worshippers.
However, it is a general theme of the Bible that personal worship cannot happen with someone else's mouth open. In Isaiah 29 God warns of people who could not or would not read or sing the words in the book True sacrifice or praise is returning God's Words back to Him because we simply are not literate enough to approach Him with the sacrifice which we have concocted out of blind minds. Because their performance effort is divisive their actions and Jude define them as the true sectarians. Isaiah lv.2, 3. Rev. i. 3.