Beginning in 2 Nephi 31:1, Nephi says that he will now make an end of his prophesying, and he can only write a few select things. Indeed, chapters 31, 32, and 33 are relatively short, only 45 verses in total. But here Nephi chooses to speak about the main elements in the all-important doctrine of Christ. The basic outline of Nephi’s farewell testimony deals with baptism, the Holy Ghost, enduring to the end on the way to eternal life, praying always, and giving Christ place in your soul.
It is interesting how often in the Book of Mormon, a person will say something like, "I am about to die, or I think I might be leaving soon, or someone is now the new king, and so this will be the last thing I have to say to you." Whether these words come in an actual address or in their final writings, when it is the final time they believe these inspired leaders will be speaking (especially when they have a prophetic worldview as Nephi did), it is important to pay close attention. One can almost imagine red flashing lights around these parts of the scriptures.