2 Nephi 33:10-15

10  And now, my beloved brethren, and also Jew, and all ye ends of the earth, hearken unto these words and believe in Christ; and if ye believe not in these words believe in Christ.  And if ye shall believe in Christ ye will believe in these words, for they are the words of Christ, and he hath given them unto me; and they teach all men that they should do good.
11  And if they are not the words of Christ, judge ye—for Christ will show unto you, with power and great glory, that they are his words, at the last day; and you and I shall stand face to face before his bar; and ye shall know that I have been commanded of him to write these things, notwithstanding my weakness.
12  And I pray the Father in the name of Christ that many of us, if not all, may be saved in his kingdom at that great and last day.

2 Nephi 33:10-12 (Emphasis mine)

Nephi(1) is closing his record on the small plates.  If we estimate 588 B.C. as the year they arrived, he has been in the New World over 40 years (using 545 B.C. as the year he ends his writings - see heading).  If we assume Nephi(1) was in his early 20's when they arrived, his now in his late 60's to his early 70's.  He probably knows his life is ending.  (His death is recorded in Jacob 1:12.)  He most likely knows that these will be his last words.  He's doubtlessly preparing to give the records to Jacob.  We should keep these things in mind as we read his closing comments.  

Nephi(1) tells us one last time to believe his words and accept Christ.  Then he says if you can't believe in and accept Nephi(1) and his words, then still believe in Christ.  He knows that, if you truly believe in Christ, you will accept his words because his words are Christ's words.  

But, if you still choose to reject his words, he will face you as you stand before the judgement bar.  Then you will know for a surety that his writings and words are Christ's words.  

In these words, we can learn much about Nephi(1).  He is a humble man, giving Christ all the credit.  He even acknowledges his weakness in writing again, knowing that we would only get his teachings through his writings.  His faith is deep and unshakable.  He knows what he knows and he doesn't apologize for it.  He has suffered at the hands of his brothers and others because of his faith and teachings.  Nephi(1) never hesitates to place his faith in the Lord.  He loves us and cares deeply for us.  He is concerned about our eternal welfare.  He knew we would be reading his words today.  His teachings and testimony is as much for us as it is for his people.  He wants to make sure we understand the consequences of not accepting his words, and if we reject his words, we reject Christ. 

In the September 1976 Ensign, Allen E. Bergin wrote and article called Nephi, a Universal Man. Describing Nephi(1), he wrote:

"Nephi was that rare combination: a great prophet who is also a founder of a nation. As prophet, he succeeded his father Lehi as spiritual leader in ancient America and laid the groundwork for the heights of righteousness later achieved. As ruler of a new nation, he was so beloved of his people that when “he anointed a man to be a king and a ruler over his people,” the people insisted on calling his successors “second Nephi, third Nephi, and so forth.” (Jacob 1:9–11.) And his influence was so great that for a thousand years the people called themselves Nephites. Near the end of that millennium, Mormon took pride in declaring himself to be a descendant of Nephi. (Morm. 1:5.) ... we sometimes fail to recognize that Nephi was one of the “universal men” of this world’s history, a person of multiple talents and skills. He led the establishment of a major civilization in the “new” world (2 Ne. 5:6, 10–11, 13); he possessed the intellect, skills, insight, and leadership capacities that class him among the great colonizers of all time. We do not usually apply the term “pioneer” to him, but we should ... In my opinion, there is nothing more powerful in these first 107 pages of the Book of Mormon than Nephi’s continuing testimony of Jesus, that he 'is the CHRIST, the ETERNAL GOD, manifesting himself unto all nations.' I recall very clearly how some years ago, as a young college student investigator, I read and reread these challenging testimonies. My initial approach had been skeptical, even cynical, and I wrote critical remarks along the margins as I read, commenting upon the weaknesses in logic, grammar, and philosophy. When I came to those last two pages (2 Ne. 33), however, I was stunned by the power of Nephi’s words. They seemed to penetrate my brain and scatter my previously systematic, critical thoughts. I could not avoid the impact of his words. It was almost as physical as if Nephi were using his shock technique on me, pointing his finger and shaking my mind. I read his words again and they seemed to grip me. Briefly and involuntarily, a sweet feeling came over me that later I recognized as having been the Spirit of Christ, the witness of his reality and his loving closeness." (Emphasis mine)

-------------------------------------------------------------------------

13  And now, my beloved brethren, all those who are of the house of Israel, and all ye ends of the earth, Farewell until that great day shall come.
14  And you that will not partake of the goodness of God, and respect the words of the Jews, and also my words, and the words which shall proceed forth out of the mouth of the Lamb of God, behold, I bid you an everlasting farewell, for these words shall condemn you at the last day.
15  For what I seal on earth, shall be brought against you at the judgment bar; for thus hath the Lord commanded me, and I must obey.  Amen.

2 Nephi 33:13-15 (Emphasis mine)

We have our last recorded words of Nephi(1).  He tells us that his voice will cry from the dust.  Isaiah referred to the words in the Book of Mormon.

4  And thou shalt be brought down, and shalt speak out of the ground, and thy speech shall be low out of the dust, and thy voice shall be, as of one that hath a familiar spirit, out of the ground, and thy speech shall whisper out of the dust.

Isaiah 29:4 (Emphasis mine)

To those who refuse to accept his words and Christ, Nephi(1) bids them an eternal farewell.  His words and teachings will stand as a witness against them.  They will not be able to say they didn't know; that they didn't understand.  Nephi(1) taught us and warned us.  If we fail to heed his words and accept Christ, we will only have ourselves to blame.  We will be responsible for the eternal consequences we will face.  

I feel it is very appropriate that his last recorded words are that he was commanded of the Lord to write and preach what he did, and, so great was his faith, he knew he had no choice but to obey. To the last, Nephi(1) was the humble servant of the Lord.

21  ¶ Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven.

Matthew 7:21 (Emphasis mine)

24  ¶ Therefore whosoever heareth these sayings of mine, and doeth them, I will liken him unto a wise man, which built his house upon a rock:
25  And the rain descended, and the floods came, and the winds blew, and beat upon that house; and it fell not: for it was founded upon a rock.

Matthew 7:24-25 (Emphasis mine)

16  Jesus answered them, and said, My doctrine is not mine, but his that sent me.
17  If any man will do his will, he shall know of the doctrine, whether it be of God, or whether I speak of myself.

John 7:16-17 (Emphasis mine)

Here we see Nephi(1)'s words anticipated Christ's future words.

Nephi(1) was truly a powerful and faithful servant of the Lord.  Throughout his life, no matter what the challenge, he stayed true to his faith.

He taught the gospel using plain and simple language.  In some ways, I'm grateful that Martin Harris lost the first 116 manuscript pages.  In their place, we have these great, wonderful, and powerful teachings.  If you want an example of how to live of life of faith, we should look no further than Nephi(1).  He is one of the best examples we could follow.