At the beginning of the chapter, Nephi writes about a few of the things that his brothers are saying as they murmur against him. Then in verse 4, he says:
"Now I do not write upon these plates all the words which they murmured against me..."
When someone murmurs against us or does us wrong, don't we usually want to tell every single word and every little thing they did? We want to prove to everyone we tell just how badly we have been treated. We treasure up the wrongs against us. We hold them close and nurse our grievances.
Instead, we need to take Nephi's example. He summed it all up succinctly (again in verse 4):
"But it sufficeth me to say, that they did seek to take away my life."
And that's enough for him. He then takes the Lord's advice to take his family and go. And then he moves on with his life. He doesn't spend his time dwelling on all the things his brothers did. e doesn't spent his time feeling hurt and abused and telling his story to everyone to get them on his side. He doesn't plot revenge against them for their bad treatment. He just moves on.