Isaiah 52

In multiplicity, Isaiah said -

"Awake, awake, put on strength, O arm of the LORD; awake, as in the ancient days, in the generations of old..." (Old Testament | Isaiah 51:9)

"Awake, awake, stand up, O Jerusalem, which hast drunk at the hand of the LORD the cup of his fury..." (Old Testament | Isaiah 51:17)

"AWAKE, awake; put on thy strength, O Zion; put on thy beautiful garments, O Jerusalem, the holy city: for henceforth there shall no more come into thee the uncircumcised and the unclean.
2 Shake thyself from the dust; arise..." (Old Testament | Isaiah 52:1 - 2)

The only reason, Isaiah would say "awake, awake..." would be that many were in a deep sleep. As Isaiah described the coming forth of the Book and Mormon and the conditions of men in that day, he wrote -

"For the LORD hath poured out upon you the spirit of deep sleep, and hath closed your eyes: the prophets and your rulers, the seers hath he covered." (Old Testament | Isaiah 29:10)

In his book, "Isaiah Plain and Simple", Hoyt W. Brewster, Jr. writes

"Awake, awake again." This is a command for the Lord's people to cease their spiritual slumbering, to shake off their apathy. In describing the spiritual awakening that had come to some converts to Christ, Alma said they were "awakened out of a deep sleep, and they awoke unto God." (Alma 5:7.) Jacob had earlier admonished some who were spiritually asleep to "arouse the faculties of your souls; shake yourselves that ye may awake from the slumber of death." (Jacob 3:11.)

The prophetic plea is to "awake before it is too late!" We remember the fate of the young man named Eutychus, who fell asleep during the apostle Paul's sermon: he fell to his death. (Acts 20:9.) Surely we should be more concerned about the risks of falling to our spiritual death.

The Book of Mormon text adds the word "again" to the imperative to awake. "This was probably because Zion, or America, was 'awakening' at the time of the Savior's visit and 'putting on her strength,' but the Savior knew that within 400 years the Nephites would lose that strength and fall again into a spiritual sleep. The use of the word 'again' indicates a dual interpretation of the Isaiah text in this instance, and supports the idea that there are other dual interpretations through Isaiah." (GAWI, 197.)