Thanks for the correction. The Trinity was most fully revealed in the Gospels which lends even greater importance to the question. If the Book of Mormon is true, then it appears that Mormon doctrine is departing from that truth. If it is not true, then there are a lot of Mormons running around with a false “burning in the bosom”.
What I cannot buy into is the argument that “The Book of Mormon never says it stands alone”. If the documents considered by Mormons as inspired “scripture” conflict with one another, it is patently evident that one or two or all cannot be relied upon to obtain truth.
One is left to their own devices to sort it all out; what is true?; what is false? Which document trumps the other when a conflict arises. There is a simple maxim that truth cannot conflict with truth. In short, one can have no confidence that they are true at all.
First let me offer you the verses that make the promise:
3Behold, I would exhort you that when ye shall read these things, if it be wisdom in God that ye should read them, that ye would remember how
merciful the Lord hath been unto the children of men, from the creation of Adam even down until the time that ye shall receive these things, and
ponder it in your
hearts.
4And when ye shall receive these things, I would exhort you that ye would
ask God, the Eternal Father, in the name of Christ, if these things are not
true; and if ye shall ask with a
sincere heart, with d
real intent, having
faith in Christ, he will
manifest the
truth of it unto you, by the power of the Holy Ghost.
5And by the power of the Holy Ghost ye may
know the
truth of all things.
lds.org/scriptures/bofm/moro/10?lang=eng&query=receive+things
Note that the promise does not say anything about a burning in the bosom. That actually comes from a passage in the Doctrine and Covenants regarding recognizing personal revelation in general.
Also note that it first says “read these things” which refers to the record, the Book of Mormon. Then, before promising a witness of the Holy Ghost it says to remember the mercies of God all the way back to Adam. Since that much is limited in the Book of Mormon, this refers to the Bible as well. Than it says “receive these things” which includes everything back to Adam, which includes the Bible that has been received, albeit with things taken out after the gentiles received it (which could very easily mean the Deuterocanonical books). The promise is for a witness from the Holy Spirit with regards to the Bokof Mormon teachings in conjunction with the Bible. That kind of tilts things in favor of getting a witness, since the Holy Spirit will not testify that the Bible is false.
However, also notice, it does not promise that the Holy Spirit will testify if these things are true, but if these things are
not true. Than iot promises that the Holy Ghost will manifest the truth of all things, hardly a debatable subject. The semantics of this Book are very subtle, but compartmentalized.
As for the Bible, the Book also says,
6Thou fool, that shall say: A
Bible, we have got a Bible, and we need no more Bible. Have ye obtained a Bible save it were by the Jews?
lds.org/scriptures/bofm/2-ne/29?lang=eng&query=Bible
It leaves out, to paraphrase, “Have ye obtained a Bible, save it were by the Catholics?”
The words that preced that verse could also have “Catholics” substituted for Jews, at this point, and all be true, with perhaps a more tangential meanin to “recovered”, that being, return to, or reassume the practices.
5 O ye Gentiles, have ye remembered the Jews, mine ancient covenant people? Nay; but ye have
cursed them, and have
hated them, and have not sought to recover them. But behold, I will return all these things upon your own heads; for I the Lord have not forgotten my people.
lds.org/scriptures/bofm/2-ne/29?lang=eng&query=Bible
The Book of Mormon is full of Catholicity, while directing people away from Catholicism. I used to think myself fool for having believed it, other than it being what I was taught. Now that I see itin a differnt perspective, and can also recognize the heresies it embeds, that I recognize what I believed in it was true. It is just that the wholebook is not.