Today's thoughts come from 3 Nephi 9:8-12.
One very important note of interest, the Lord never destroys a people without giving them ample warning that it will happen, and the chance to repent and to turn to Him again. For example, Noah called the people to repentance for several decades before the flood came. What would happen was prophesied and spoken of all the way back in 1 Nephi 19:10-12.
The people were not ignorant of their sins. They were all converted to the truth just a few short years ago. They had set their hearts on the vain things of the world, and received their reward from their master, which is death and destruction, because the adversary wishes all to be miserable like himself, see 2 Nephi 2:27.
Christ is the light and life of the world, Alma 38:9.
He is the tree of life, and partaking of what he offers brings eternal life. Conversely, the adversary can be represented by the tree of knowledge of good and evil, which brings death, both temporal and spiritual. See Thoughts on the Tree of Life.