Because the writing is sealed there must be a way to break the seal. That means is through the two stones that are given to the brother of Jared. In a sense, this conversation gives both a lock and a key for the record of the brother of Jared. Those two stones are the very ones that King Mosiah used to translate the plates of Ether (see Mosiah 28:13-20), fulfilling this particular prophecy, and providing a foreshadowing of the translation of the whole of the Book of Mormon.