3 Nephi 21:1-7 is the longest sentence in the Book of Mormon, clocking in at 392 words.
It’s an odd section anyway, or so I thought when I first read it. Here we have none other than the resurrected Jesus Christ teaching the righteous survivors of an apocalyptic destruction. After a declaration of basic doctrines, a version of the Sermon on the Mount, and some beautiful healing and angelic ministering miracles, most of the rest of 3 Nephi focuses on the not-terribly-exciting subject of the gathering of Israel.
I used to find that anti-climactic. No parables, no conflict, no drama at all, really–most of the famous visit to the New World is a dry lesson on one aspect of the future.
And this sentence may be the weirdest part. Jesus tries to make a simple point, but seems to keep getting distracted and going back to start over. It’s easy to get lost in the jungle of syntax here.
I broke the passage up by highlighting some key repetitions and setting off parenthetical details, using colors and indenting. I think the major point comes across more clearly this way.