Jacob uses Isaiah Chapter 50 to establish the reality of a coming Messiah, in addition the centrality of Israel to the Lord's plans. Israel is forever backsliding and wayward. Yet the decision to "divorce" Israel is the Lord's and He refuses to do so. (2 Ne. 7: 1.) It was always in His mind to preserve a remnant of Israel as His "fruit" or the product of His mission and ministry. Jacob will return to this theme in his own book. We will look at that later. Here we are just becoming acquainted with Jacob as a teacher.
Even at the end of days, the Lord will continue to focus on redeeming Israel. The "rock" from which they were hewn was Abraham and Sarah, the father of the righteous and his beloved wife. (2 Ne. 8: 1-2.) The problem with Israel is the slumber that keeps them from awakening to their awful situation and repenting of their sins. Jacob sees the end of time, and Israel still slumbers and cannot establish Zion because of their deep sleep. They must awake, put on the strength of salvation or priesthood, shed their filth for beautiful garments, and cease association with the unclean and uncircumcised. (2 Ne. 8: 24.) Zion will not otherwise come to pass.
Zion will never emerge from those who slumber in the dust, whose necks are bound with iron. (2 Ne. 8: 25.)
Zion evades those who desire it because they are too ill-educated, thinking their scholarship has merit and the Holy Spirit does not. (2 Ne. 9: 29.) They are rich, and think it a good thing rather than a hindrance. (2 Ne. 9: 30.) They will not hear, and therefore are as good as deaf. This form of deafness prevents them from hearing the warning and so they will perish in their ignorance of the truth. (2 Ne. 9: 31.) They are also deliberately blind, refusing to see the truth when it is presented to them. (2 Ne. 9: 32.) They are uncircumcised, liars, whoring after other gods, and worshiping idols. (2 Ne. 9: 33-37.)
It is Jacob who testifies the "keeper of the gate is the Holy One of Israel" and "he employeth no servant there." (2 Ne. 9: 41.) Jacob entered through that gate and met the Gatekeeper. He reminds us that He "cannot be deceived, for the Lord God is his name." (Id.)
Jacob then reminds us of his role - the prophet's role: "Would I harrow up your souls if your minds were pure? Would I be plain unto you according to the plainness of the truth if you were free from sin?" (2 Ne. 47.) The prophet's role is always to cry repentance. Priests may preside, and kings may rule, but the prophet's voice is always crying repentance. Prophets have almost never presided over a congregation (other than occasionally a small inner-circle). They always speak from the sidelines crying for a return to God's ways. Even when there were cities who repented in response to the message of repentance, the prophets who gathered them taught repentance and left it to the assembly to govern themselves. So it was with Enoch, and Melchizedek, and similarly Joseph attempted to teach repentance to his people. Enoch and Melchizedek were able to teach the people who wanted so desperately to repent (and did so) that they had angels and the Lord come dwell among them. Joseph sought to accomplish the same, but the Lord never dwelt among the Saints of this dispensation. Jacob bids his brethren and us to repent, hoping his teaching will eventually lead to a latter-day Zion. Apparently there will be a small group who will eventually repent and qualify for the Lord to come dwell among them. It remains a distant possibility, without any concrete progress underway as yet.