3rd Nephi 1-3
Behold, now it came to pass that when Jesus had spoken these words he looked round about again on the multitude, and he saith unto them: Behold, my time is at hand. I perceive that ye are weak, that ye cannot understand all my words which I am commanded of the Father to speak unto you at this time. Therefore, go ye unto your homes, and ponder upon the things which I have said, and ask of the Father, in my name, that ye may understand, and prepare your minds for the morrow, and I come unto you again.
When there are things that we do not understand we should pray and fast and God will give us understanding. It might take a little while, but it will come with trough humble prayer. When you first hear about this work sometimes it can be a little overwhelming. Through prayer understanding will come though.