4 brothers and their actions

Rachel and I are starting over in the Book of Mormon. So I've been thinking about the 4 sons of Lehi. The were told to do a job and they went and did exactly what they were told - but it didn't work. The second time they used their ingenuity and tried again - but that didn't work. At this time they receive divine guidance and know they are suppose to finish an impossible job. So a large in stature but young man finishes a job the Lord asks him to do with consequences that will stay with him for the rest of his life, though his actions were necessary for millions of people's well-being.

I'm mulling over the idea that sometimes the Lord knows the job assigned is not possible with our own resources and circumstances and assigns it to us anyway. The other thought is that the answer is sometimes outside of our box of thought and knowledge. And my third notion is to wonder if I go far enough in my duties to God.

The other thing that struck me was the fact that Laban was a very dangerous man. Someone who is known to command 50 or tens of thousand - command for what? Isn't command a military term? I noticed the boys mother wasn't worried about them being lost or hurt by wild animals, she knew who was the most dangerous to her boys.