Literary: Moroni returns to his beginning statement. His purpose was to place the final witness on his father’s works, and part of that is the personal colophon that indicates the writing and the method. The beginning of this formal statement is in Mormon 8:13-14. After the insertion of his long discourse to future readers, he returns to his original statement that is to seal the work. This is yet another indication that the intervening verses were not part of even the mental plan, but simply came to Moroni because of his understanding and concern for the future readers of the text.
Social: At the very end of the text Moroni tells us about the nature of the text. He has testified that it is his and his father’s hand that has written it. He has noted his filial relationship. Now he declares the mode of writing. It is interesting the type of information we get in this verse, but to fully understand it, we need the information in the next verse.