8 And if you do these last commandments of mine, which I have given you, the gates of hell shall not prevail against you; for my grace is sufficient for you, and you shall be lifted up at the last day.
This section is incredibly reassuring. The three witnesses sought revelation to know if they would be able to see the plates. The Lord reassures them that because they have had faith they will have that opportunity. But more significantly in my mind he gives them a reassurance that if they remain faithful and continue to testify of what they have been commanded, then they will be saved in God’s Kingdom. God’s promise is always sure. If we follow him and keep the “last” or latest commandments he has given us, then we will always be on the right path and nothing can overcome us.