The command to “become as a little child” is unique to the Book of Mormon, but it is related to one of Jesus’s sayings, recorded in both Mark and Luke: “Whosoever shall not receive the kingdom of god as a little child, he shall not enter therein” (Mark 10:15; Luke 18:17). The idea of receiving these teachings as a little child may refer to both the capacity for learning, and for the fact that what children learn when they are young form the foundations for things they later learn in life. If we were to take language as a model, if we were to learn to obey the Lord with the easy fluency with which we speak our native language, we would naturally obey and live the commandments.
Christ reiterates that this is his doctrine, and that it is the foundation of the other teachings which he will give them. It is not all, it is the foundation; the foundation built on rock and not on sand.”
Following the declaration that this is his doctrine, Christ commands that they teach it.
This is not the end of a chapter in the 1830 edition of the Book of Mormon.