Historical/narrative analysis: This verse provides us information about a lost revelation to Lehi. According to this the angel, by the time Nephi is viewing this vision the Lord has already convenanted with Lehi that the world Nephi sees in vision shall be the new land of inheritance for is posterity. This is the first indication in the chronological text that the Lehite band would have had an idea of where they were going. Nephi's account does not explicitly mention this, but the statement of the angel makes it clear that Lehi has received this confirmation from the Lord. The record of that revelation/covenant is lost, and preserved only here.