Verse 30 continues the concept with which Moroni began in verse 29. He now understands that faith is the process whereby weaknesses are made into strengths. He clearly understands faith as a monumental transformational tool, which he expresses as removing mountains. It is not clear what Moroni meant by the brother of Jared’s removal of Mount Zerin. One possibility might be a volcanic event such as Mount St. Helens. However, most of the mountain remained, even after the gigantic explosion.
Redaction: Moroni does not explain this incident, apparently assuming that his readers are already familiar with it; but it is recorded only here. We may safely assume that Ether included it on his plates, as that is the only known record of the brother of Jared. The fact that Moroni mentions it here continues to confirm his heavy editing of and lengthy omissions from the brother of Jared’s story.