Redaction: Moroni is very cognizant of his insertions into the story of Ether. He has done two things to effect the transition from his insertion back into the story. The first is that he has placed a firm ending on the insertion. Chapter 12 represents the end of a chapter, and the “Amen” with which it closes indicates that Moroni has considered that topic completed. Now, at a new beginning of a new chapter, he explicitly reintroduces the interrupted subject.
It should be emphasized, however, that Moroni is not return to translation, or even to copying. Moroni is returning to telling. This is still Moroni, but he is telling a different tale at this point. He is returning to the story instead of elucidating the moral.