Notice how often Nephi wrote about following the Son of God and doing the things the Son did (see vv. 5, 9–10, 12–13, 16–17). In Jesus Christ we have the perfect example of one who entered the path leading to eternal life and never departed from it.
The Savior himself indicated how important the doctrine of Christ is when he said, “Verily, verily, I say unto you, that this is my doctrine, and whoso buildeth upon this buildeth upon my rock, and the gates of hell shall not prevail against them” (3 Nephi 11:39). For parallel discussions on the doctrine of Christ see 3 Nephi 11:31–41, 27:8–22, and Moses 6:48–68.
Notice in 2 Nephi 31:3 Nephi’s desire to make his words plain and easy for us to understand (see also 2 Nephi 25:4, 33:6).