Stumbling Without Christ's Full Gospel

Thou seest that after the book hath gone forth
through the hands of the great and abominable church,
that there are many plain and precious things
taken away from the book,
which is the book of the Lamb of God.

And because of the many plain and precious things
which have been taken out of the book,
which were plain unto the understanding
of the children of men, according to
the plainness which is in the Lamb of God—
because of these things which are taken away
out of the gospel of the Lamb,
an exceedingly great many do stumble.
(1 Nephi 13:28-29)