Once again, remember Nephi’s statements about going and doing the Lord’s commandments in 1 Nephi 3:7 and 17:3. These concluding words here in verses 30–31, encouraging all to be obedient to the commandments and to endure to the end, are clearly related to Nephi’s earlier declarations of commitment that reverberate throughout the book of 1 Nephi and consistently draw the book of 1 Nephi together.
In sum, I testify that Nephi was truly a great prophet. There are so many things that we can learn about him and from him. I bear witness that Nephi saw the Lord Jesus Christ. He testified in 2 Nephi 11 that he had seen him, that Isaiah had seen him, that Jacob had seen him, just as Lehi had also seen him. We have here eyewitnesses of the premortal Christ. Throughout his life, Nephi was a great preacher of righteousness, not only in word but also in deed: "And we talk of Christ, we rejoice in Christ, we preach of Christ, we prophesy of Christ and we write according to our prophecies that our children may know to what source they may look for a remission of their sins" (2 Nephi 25:26).
Book of Mormon Central, "How Do Commandments Bring Us Peace and Happiness? (2 Nephi 5:10)," KnoWhy 347 (August 2, 2017).
Book of Mormon Central, "What Does it Really Mean to be Blessed For Keeping the Commandments? (Mosiah 2:41)," KnoWhy 367 (September 26, 2017).