refer in this text to 2 Ne. 1:5
“If our eternal salvation depends upon our ability to understand the writings of Isaiah as fully and truly as Nephi understood them—and who shall say such is not the case!—how shall we fare in that great day when with Nephi we shall stand before the pleasing bar of Him who said: ‘Great are the words of Isaiah’? (3 Ne. 23:1) … It just may be that my salvation (and yours also!) does in fact depend upon our ability to understand the writings of Isaiah as fully and truly as Nephi understood them.” (Bruce R. McConkie, Ensign, Oct. 1973, p. 78)