Something I've never really ever thought of, and maybe simply because it's so obvious, but...
When Nephi goes on in his rant toward those who were desirous to go to Jerusalem, he keeps saying "How could you forget?". Things like "How have you forgotten the great things the Lord hath done for us" makes an incredible assumption on his part; well, either that, or there is some connection between remembering and righteousness
and forgetting and faltering.
I personally believe it's the latter.
Nephi must have known about that connection, because he says, in verses 8-13, some deritative of the word "forgot" 3 times.
How did he know they "forgot"? What is so important about remembering? The words "treasure up
in your minds continually the words of life..." Goodness, I can't write down the verses fast enough which come to me about remembering.
I must assume that Nephi knew they had forgot all those things due to their actions. It must be that one cannot act with the knoweldge (remembering) of the things of God without acting in open rebellion
against God. I guess if I had to assume one of the two things about my brothers, I'd assume they forgot, too.
Continuing on through verse 21 makes me wonder why the Lord didn't just sort of, you know, let Laman and Lemuel go back to Jerusalem...? Darn that free agency! Anyway...
One of the verses which caught my eye was definitely 21. The first sentence.
"And it came to pass that I did frankly
forgive them all that they had done." Like it was no big deal. I wish I could harbor that kind of forgiveness to those who have wrought offense against me. Usually, it's not hard at all, but the circumstances under which Nephi forgave were definitely ones which would cause me heartburn.