Why Did Nephi Say That People Had to Learn Things Line Upon Line?

2 Nephi 28:30 states, “I will give unto the children of men line upon line, precept upon precept.” Nephi told his people to continuously seek knowledge from God, because God teaches people, “line upon line, precept upon precept.” This phrase is a modified quote from Isaiah 28:10, where the prophet condemned the inability of the false priests and prophets of Israel to receive revelation from the Holy Ghost. Because God could not reveal anything to these priests, he would instead teach the rising generation, one commandment at a time. 2 Nephi 28, shows that as believers are faithful to the truth they have already received, they will receive more.