He returns to his main testimony. If Yahweh can effect such a miracle as the atonement (through the Savior), how could he ever cease to be a God of miracles? Because the resurrection and our final judgment and reward are still to come, how can he have ceased to be a God of miracles if we still believe that this ultimate miracle is in our future? I conjecture that Moroni is basing some of this argument on the letter from his father that he includes as Moroni 7. Note the parallels from that letter:
Wherefore, my beloved brethren, have miracles ceased because Christ hath ascended into heaven, and hath sat down on the right hand of God, to claim of the Father his rights of mercy which he hath upon the children of men?
For he hath answered the ends of the law, and he claimeth all those who have faith in him; and they who have faith in him will cleave unto every good thing; wherefore he advocateth the cause of the children of men; and he dwelleth eternally in the heavens.
And because he hath done this, my beloved brethren, have miracles ceased? Behold I say unto you, Nay; neither have angels ceased to minister unto the children of men. (Moro. 7:27–29)
Although the letter is entered into Moroni’s text much later than his completion of his father’s record, it was obviously written and received before that time. I believe that Moroni was sufficiently impressed with the content of that letter to echo it here and include the entire letter in his eponymous book.