1 Nephi 20 - 2 Nephi 1

Nephi tells us -

"...I, Nephi, do speak somewhat concerning the words which I have written, which have been spoken by the mouth of Isaiah. For behold, Isaiah spake many things which were hard for many of my people to understand..." (Book of Mormon 2 Nephi 25:1)

Speaking of the Bible, Nephi also testified that controlling men have -

"...taken away from the gospel of the Lamb many parts which are plain and most precious; and also many covenants of the Lord have they taken away.
27 And all this have they done that they might pervert the right ways of the Lord, that they might blind the eyes and harden the hearts of the children of men." (Book of Mormon 1 Nephi 13:26 - 27)

As I read and ponderthe words of Isaiah, I believe the Lord had Isaiah write in such a manner that the revealed word was not plain, such that his words would remain very much intact. For example, we see the very plain words -

"...or out of the waters of baptism..." (Book of Mormon 1 Nephi 20:1)

removed from the King James version of the Bible.

Jacob also gives us some insight in why Isaiah may have written in a manner hard to understand -

"...the Jews were a stiffnecked people; and they despised the words of plainness, and killed the prophets, and sought for things that they could not understand. Wherefore, because of their blindness, which blindness came by looking beyond the mark, they must needs fall; for God hath taken away his plainness from them, and delivered unto them many things which they cannot understand, because they desired it. And because they desired it God hath done it, that they may stumble." (Book of Mormon Jacob 4:14)

I see much of that today where plainess has been taken away because the world desires it.

As I read and ponder the words of Isaiah, and acknowledgin that the words are not necessarily plain, there are always new things I come to understand each time I read his words. And the Spirit testifies to me that the words are true. As one searches the words if Isaiah, you begin to understand that all his words seem point in one direction and that is of the Savior, the Redeemer of Israel, the Messiah, the Lord Jesus Christ and in repentance, and obedience to his will and commandments.

"..And thus saith the Lord, thy Redeemer, the Holy One of Israel; I have sent him, the Lord thy God who teacheth thee to profit, who leadeth thee by the way thou shouldst go, hath done it.
18 O that thou hadst hearkened to my commandments—then had thy peace been as a river, and thy righteousness as the waves of the sea." (Book of Mormon 1 Nephi 20:17 - 18)

"...Thus saith the Lord, the Redeemer of Israel, his Holy One, to him whom man despiseth, to him whom the nations abhorreth, to servant of rulers: Kings shall see and arise, princes also shall worship, because of the Lord that is faithful." (Book of Mormon 1 Nephi 21:7)

"...They shall not hunger nor thirst...for he that hath mercy on them shall lead them, even by the springs of water shall he guide them.
11 And I will make all my mountains a way, and my highways shall be exalted." (Book of Mormon 1 Nephi 21:10 - 11)

For -

"...Behold, I have graven thee upon the palms of my hands..." (Book of Mormon 1 Nephi 21:16)

And the day will come that -

"...all flesh shall know that I, the Lord, am thy Savior and thy Redeemer, the Mighty One of Jacob." (Book of Mormon 1 Nephi 21:26)

In conclusion, I think it is important to note that Nephi prophecies that -

"...in the days that the prophecies of Isaiah shall be fulfilled men shall know of a surety, at the times when they shall come to pass." (Book of Mormon 2 Nephi 25:7)