Sealed book of Mormon Ch.9

AND now, I, Moroni, have been instructed by
the Spirit to write an explanation of the
priesthood of God which I have mentioned
previously in this record. And this explanation
is also taken from the words of the brother of
Jared. But again I say unto you, that I knew the
true meaning of this priesthood, having received
this knowledge from the Spirit of God that hath
accompanied me all the days of my life.
And it shall come to pass that the knowledge
of this priesthood shall be had among the Jews
and the Gentiles in the last days. Nevertheless,
they shall not understand this priesthood, nor
shall they have the Spirit to teach them the truth
regarding these things, because they choose not
to follow the words of Christ in righteousness,
and therefore, have forfeited the right to know
these things.
For it shall come to pass that this
priesthood shall be misunderstood and
misused in such a way that men will begin to
exercise control and dominion over the souls
of the children of men; because in their pride,
they will claim that they have been given the
authority to do so by those who have the
authority to give this power unto them.