Moroni has been discharging his responsibility to teach the gospel of Christ. Now, he comes to the end of his words, and of his father’s record and masterwork. He turns to what he has written.
It is easy to assume that when Moroni speaks of the imperfections in what he and others have written that he must be referring to mistakes in recording, or words, or grammar, or maybe in missing some historical event. That is not the message. The imperfections Moroni is interested in here are those of the human condition. They are the times when we deviate from the straight course of God’s way. That is the reason that Moroni commends to us that we learn from their imperfections, that “[we] may learn to be wiser than [they] were.”