Mosiah 18:2 Yeah, concerning that which was to come, and also concerning the resurrection of the dead, and the redemption of the people, which was to be brought to pass through the power, and sufferings, and death of Christ, and his resurrection and ascension into heaven.
"the power" is that of Jesus to use His agency and authority given by God the Father, to lay down His life. I'm sure it can and does mean other things as well, but that was the impression when I first read it. His sufferings, death, and subsequent resurrection and ascension into heaven were by His power and the grace of our loving Father in Heaven.
Alma 21:9 Now Aaron began to open the scriptures unto them concerning the coming of Christ, and also concerning the resurrection of the dead and that there could be no redemption for mankind save it were through the death and sufferings of Christ, and the atonement of his blood.
The death, sufferings, and atonement of Jesus Christ were by the power given Him by His Father and the use of His own agency to do the will of Father.
