I should begin by saying that one "Steve Miller" is quoted in Her Amun's post as saying that the Book of Mormon use of "if...and" seems to indicate a stronger cause-effect relationship than that construction denotes in Hebrew. That would seem to be a mark against the claim that what we have in the Book of Mormon is a "Hebraism".
Here is the raw text of Helaman 12:7-22. The portions in brackets are from the 1830 Book of Mormon; the remainder is Skousen's transcription of the original Book of Mormon manuscript. (I had to fill in Skousen's ellipses and provide context.)
[O how great is the nothingness of the children of men; yea, even they are less than the dust of the earth. For behold, the dust of the earth moveth hither and thither, to the dividing asunder, at the command of our great and everlasting God; yea, behold at his voice do the hills and the mountains tremble and quake; and by the power of his voice they are broken up, and become smooth, yea, even like unto a valley; yea, by the power of his voice doth the whole earth shake; yea, by the power of his voice, do the foundations rock, even to the very center;] yea and if he sayeth unto the earth move and it is moved; yea if he say unto the earth thou shalt go back that it lengthen out the day for many hours and it is done; [and thus according to his word, the earth goeth back, and it appeareth unto man that it standeth still; yea, and behold this is so: for sure it is the earth that moveth, and not the sun.] and behold also if he sayeth unto the waters of the great deep be thou dried up and it is done behold if he sayeth unto this mountain be thou raised up and come over and fall upon that city that it be buried up and behold it is done [And behold if a man hideth up treasure in the earth, and the Lord shall say, Let it be accursed, because of the iniquity of him that hath hid it up, behold, it shall be accursed;] and if the Lord shall say be thou accursed that no man shall find thee from this time henceforth and forever and behold no man getteth it henceforth and forever and behold if the Lord shall say unto a man because of thine iniquities thou shalt be accursed forever and it shall be done and if the Lord shall say because of thine iniquities thou shalt be cut off from my presence and he will cause that it shall be so[.-- And wo unto whom he shall say this, for it shall be unto him that will do iniquity, and he cannot be saved; therefore, for this cause, that men might be saved, hath repentance been declared.Therefore, blessed are they who will repent and hearken unto the voice of the Lord their God; for these are they that shall be saved.]
Here is a summary of what I think is the structure of the passage:
A. Men are less than the dust of the earth,
B. And God moves the earth however he pleases.
C. If God orders the earth to move and it does,
D. And if God orders that you be cut off for sin and it is done,
E. Then you better repent!
Here is that structure applied to the whole passage:
A. Men are less than the dust of the earth,
- O how great is the nothingness of the children of men; yea, even they are less than the dust of the earth.
- For behold, the dust of the earth moveth hither and thither, to the dividing asunder, at the command of our great and everlasting God;
- yea, behold at his voice do the hills and the mountains tremble and quake;
- and by the power of his voice they are broken up, and become smooth, yea, even like unto a valley;
- yea, by the power of his voice doth the whole earth shake;
- yea, by the power of his voice, do the foundations rock, even to the very center.
- yea and if he sayeth unto the earth move and it is moved;
- yea if he say unto the earth thou shalt go back that it lengthen out the day for many hours and it is done; and thus according to his word, the earth goeth back, and it appeareth unto man that it standeth still; yea, and behold this is so: for sure it is the earth that moveth, and not the sun.
- and behold also if he sayeth unto the waters of the great deep be thou dried up and it is done
- behold if he sayeth unto this mountain be thou raised up and come over and fall upon that city that it be buried up and behold it is done
- And behold if a man hideth up treasure in the earth, and the Lord shall say, Let it be accursed, because of the iniquity of him that hath hid it up, behold, it shall be accursed;
- and if the Lord shall say be thou accursed that no man shall find thee from this time henceforth and forever and behold no man getteth it henceforth and forever
- and behold if the Lord shall say unto a man because of thine iniquities thou shalt be accursed forever and it shall be done
- and if the Lord shall say because of thine iniquities thou shalt be cut off from my presence and he will cause that it shall be so --and wo unto whom he shall say this, for it shall be unto him that will do iniquity, and he cannot be saved;
- therefore, for this cause, that men might be saved, hath repentance been declared.
- Therefore, blessed are they who will repent and hearken unto the voice of the Lord their God; for these are they that shall be saved.
I think the problem here for most interpreters is that what we have from verses 13-23 is essentially one really long sentence, with lengthy asides (which I have italicized) in verses 15 and 22 that interrupt the sentence's flow. One of these asides immediately precedes the predicate in v. 23, thereby obscuring its relationship to the list of conditions that precedes it. Joseph was orally dictating this, and so we should not expect the crisp style of an expert author. Rather, what we find here has more of the cadence and rhythm of a frontier sermon.
Notice, however, how much sense my reading makes of this passage. The progression here is perfectly logical. If God curses a treasure and hundreds of years later this curse remains in effect, and if God similarly curses you and it is binding, then you're screwed unless you repent. If God divides asunder the earth and the waters and it lasts forever, and if he similarly cuts you off from his presence, then you're screwed unless you repent. So you might want to get on that ASAP.
What do you all think? Have I solved the "if...and conditional" mystery?
Best,
-Chris