1 Nephi 8

Chapter 8 is all about Lehi's dream of "The Tree of Life".

from Book of Mormon Manual - LDS Institute

Personally, I think that the above table is extremely helpful with really understanding Lehi's dream. So I wanted to include it in here for all of you to use.

There is so much that I could focus on in this chapter. But I think that I'm actually going to focus on what Lehi teaches his family after his dream.
In verses 37 and 38, it reads:

And he did exhort them then with all the feeling of a tender parent, that they would hearken to his words, that perhaps the Lord would be merciful to them, and not cast them off; yea, my father did preach unto them.

And after he had preached unto them, and also prophesied unto them of many things, he bade them to keep the commandments of the Lord; and he did cease speaking unto them. 

It would be a hard thing to teach and guide wayward children back to the path that leads them to happiness. I'm sure you'd feel entirely helpless and insignificant with your efforts. Elder Robert D. Hales said:

We too must have the faith to teach our children and bid them to keep the commandments. We should not let their choices weaken our faith. Our worthiness will not be measured according to their righteousness. Lehi did not lose the blessing of feasting at the tree of life because Laman and Lemuel refused to partake of its fruit. Sometimes as parents we feel we have failed when our children make mistakes or stray. Parents are never failures when they do their best to love, teach, pray, and care for their children. Their faith, prayers, and efforts will be consecrated to the good of their children (in Conference Report, Apr. 2004, 90; or Ensign, May 2004, 88). 

We have to remember that we are each individually blessed with agency. We each have the ability to choose right or wrong. You can't make someone do something. You shouldn't attempt to take their agency away. Just do the absolute best you can and recognize that you did your best. But don't ever give up on them. on anyone.