"The book of Isaiah was the only book of the ancient prophets the resurrected Savior specifically commanded the Nephites to search.
"The Savior said, 'Ye remember that I spake unto you, and said that when the words of Isaiah should be fulfilled - behold they are written, ye have them before you, therefore search them…' (3 Ne. 20:11.) Further, He declared, 'And now, behold, I say unto you, that ye ought to search these things. Yea, a commandment I give unto you that ye search these things diligently; for great are the words of Isaiah.' (3 Ne. 23:1.)
"Monte S. Nyman, in his book, Great Are the Words of Isaiah, wrote: 'That the commandment was to be extended to the latter days, and especially to the readers of the Book of Mormon, is shown by the Savior's charge to the Nephites to record His words so that they could go forth unto the Gentiles: Therefore, give heed to my words; write the things which I have told you; and according to the time and the will of the Father they shall go forth unto the Gentiles. (3 Ne. 23:4.)'" (Church News, 06/30/90)
Hugh Nibley
"'Great are the words of Isaiah!' We have been commanded to search them, study them, ponder them, take them to heart, and understand that the calamities and the blessings therein are meant for our own generation. May the words of this great prophet prepare us for these calamities and blessings." (Old Testament and Related Studies, p. 237)