Nephi prophesied about the last days. He received a revelation from God that taught him that the records he and his descendants were keeping would come forth again in the latter-days to teach people about Jesus Christ. This book would be another witness of Jesus Christ, like the Bible. The book he was speaking about is The Book of Mormon. 

Nephi knew that many people would say that the Book of Mormon was not needed, because we already have a Bible, or that we have “enough” revelation and don’t need more. But Nephi reminds us that God teaches us a little at a time, “line upon line, precept upon precept.” 

A toddler wouldn’t be able to know everything they should do, but as the child grows, he or she learns a little at a time  from family, friends, and teachers until they are ready to leave home and start a family of their own. We learn and grow in the gospel in the same way. 

Even today, our prophet receives revelation to help us better understand and live the gospel. We can also receive revelation through prayer and study by the power of the Holy Ghost.

Jesus Christ invites all people to come unto Him, not just the Jews who lived in Jerusalem a long time ago, or the Nephites who lived in the Americas a long time ago. He speaks to all people and helps us to learn day by day the things we can do to return to Him, and help others along our way.