The scriptures teach that no unclean thing may enter into the presence of God, but Moroni commented on an additional benefit of becoming perfected in Christ:
[I]f ye by the grace of God are perfect in Christ, and deny not his power, then ye are sanctified in Christ by the grace of God, through the shedding of the blood of Christ, which is in the covenant of the Father unto the remission of your sins, that ye may become holy, without spot.
What an invitation! What a wonderful, enabling instruction on how to receive the grace of Christ—be perfected in him, made holy, and without spot; all of which will qualify us to abide in his holy presence.
One can truly enjoy the spirit of Moroni’s distillation of everything that he was trying to convey. It is inspiring to observe how the principles that we encounter at the end of the Book of Mormon have been taught throughout the record, how the way had been prepared, and how the groundwork had been laid all along so that Moroni could tie it together for a meaningful conclusion. There is hardly a single verse in the whole Book of Mormon that is not somehow directed at channeling the reader to these concluding points. It is a brilliantly superb summation of the entire Book of Mormon and, in and of itself, it is a truly remarkable, communicative conclusion and composition.