Nephi puts it into two, opposing camps. There are only two. There are either inspired teachings, given by revelation and confirmed by the Holy Ghost, or they are man's understanding. The first will save you. The other will curse you. There is no happy marriage. You cannot have both. This sword cuts both ways, and forces you to make a decision. Your eternity will be affected by the decision. So either you find the right way and follow it, or you are relying upon men and will in the end be cursed.
Oh, wait a minute, I got carried away. I forgot we were trying to understand Nephi's message. For a minute there I was too wrapped up in our own message. Well, to return to Nephi - someone's going to be cursed for trusting in men. Only those whose precepts and teachings originate in the Holy Ghost are going to be saved. It is a terrible burden to confront. It almost makes us want to turn away in sorrow rather than continue on following our Lord. (See John 6: 65-67.) But, then again, who else has the words of eternal life other than Him?