Moroni closes the letter with a final statement that the problem is one of covenant obligations to God. To be righteous, a Chief Judge must take care of his people. For Moroni, that is especially important in a time of war. Therefore, Moroni invokes God as the one who will mete out judgment on Pahoran, should he continue to shirk his responsibilities (Moroni does not yet know why Pahoran hasn’t fulfilled those responsibilities).
The closing of the letter closes this chapter. Pahoran’s response is in the next chapter.