Nephi left Jerusalem with his family 600 years before Christ was born, his father Lehi leading them. Years later after recording the "things of the ministry" including many prophecies and the words of Isaiah as well as Nephi's brother Jacob, he leaves us with this firm testimony and promise.
2 Nephi 33 (The Book of Mormon)
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.
13 And now, my beloved brethren, all those who are of the house of Israel, and all ye ends of the earth, I speak unto you as the voice of one crying from the dust: 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.
Let us believe in Christ. Let us hearken to his words. Let us pray to the Father in his name. Let us partake of his goodness, of the atoning sacrifice he made for us. He knows our sorrows. Let us set aside our sins and take upon ourselves his yoke. He pulls harder than any man. And if we do, life and its many burdens will be made lighter, easier. And we will meet him again and fall down at his feet to worship him, our tears bathing the prints of the nails in his feet. And he will gently pull us up to with strong arms to receive his loving embrace and hear the words, "Well done, my good and faithful servant. Enter into my rest."