Speaking of the importance of studying eschatology, Joel Richardson wrote:
Another reason that has, in my opinion, been highly overlooked by most prophetic ministers in the church is that a proper grasp of biblical eschatology is the essential foundation of any truly prophetic ministry. I say this in reference to any individual called to the specific office of prophet as well as to any church that feels called corporately to be a prophetic people. What I mean by prophetic in this case is not merely the gifting or ability from God to speak an encouraging, edifying or even a directional word to another individual. I am speaking of those prophetic ministers or churches that feel called to prophesy to and about specific events from God’s perspective. I am speaking about individuals and churches that feel called to become a relevant force on the earth or in their cities and communities. It is my conviction that as a result of a lack of a clear vision of the future, founded on a proper understanding of biblical eschatology, the church suffers and tends to be far less effective as a truly prophetic people. The same can be said regarding any individual called to a prophetic ministry.
Let me try to restate this a bit more clearly. The Bible gives us very specific and detailed information about the future of this world. These events will have unparalleled social, economic, religious, and most importantly, spiritual implications for the entire earth. If someone believes himself or herself called to be a prophetic voice that speaks with relevance and power from God to the world and the greater lukewarm Western church (a majority of the Old Testament’s prophecies were directed at the lukewarm Israelites), then it is absolutely necessary to first understand the clear prophetic word already written. (Joel Richardson, The Islamic Antichrist [Washington, D.C.: WND Books, 2015], 237-38)
Of course, Richardson does not view such prophecy to be as authoritative as the Bible (he accepts the false doctrine of Sola Scriptura), so such should not be taken as him advocating a view that is en par with the Latter-day Saint belief in continuing revelation that is as authoritative as biblical revelations. Richardson writes:
The revelation that any prophet delivers needs to be built on the solid foundation of the established, capital-P Prophetic Word in the Bible. Those who wish to be prophetic (lowercase p) without first having ingested and assimilated the Prophetic Eschatological Gospel into their being will be significantly stunted in the effectiveness of their ministry. (Ibid., 239)
Interestingly, John Calvin, another staunch advocate of Sola Scriptura, did not believe that the prophetic office ceased with the completion of the New Testament. In Institutes 4.3.4, he wrote:
Those who preside over the government of the Church, according to the institution of Christ, are named by Paul, first, Apostles; secondly, Prophets; thirdly, Evangelists; fourthly, Pastors; and, lastly, Teachers (Eph. 4:11). Of these, only the two last have an ordinary office in the Church. The Lord raised up the other three at the beginning of his kingdom, and still occasionally raises them up when the necessity of the times requires. The nature of the apostolic function is clear from the command, "Go ye into all the world, and preach the Gospel to every creature" (Mark 16:15). No fixed limits are given them, but the whole world is assigned to be reduced under the obedience of Christ, that by spreading the Gospel as widely as they could, they might everywhere erect his kingdom. Accordingly, Paul, when he would approve his apostleship, does not say that he had acquired some one city for Christ, but had propagated the Gospel far and wide--had not built on another man's foundation, but planted churches where the name of his Lord was unheard. The apostles, therefore, were sent forth to bring back the world from its revolt to the true obedience of God, and everywhere establish his kingdom by the preaching of the Gospel; or, if you choose, they were like the first architects of the Church, to lay its foundations throughout the world. By Prophets, he means not all interpreters of the divine will, but those who excelled by special revelation; none such now exist, or they are less manifest. By Evangelists, I mean those who, while inferior in rank to the apostles, were next them in office, and even acted as their substitutes. Such were Luke, Timothy, Titus, and the like; perhaps, also, the seventy disciples whom our Saviour appointed in the second place to the apostles (Luke 10:1). According to this interpretation, which appears to me consonant both to the words and the meaning of Paul, those three functions were not instituted in the Church to be perpetual, but only to endure so long as churches were to be formed where none previously existed, or at least where churches were to be transferred from Moses to Christ; although I deny not, that afterward God occasionally raised up Apostles, or at least Evangelists, in their stead, as has been done in our time. For such were needed to bring back the Church from the revolt of Antichrist. The office I nevertheless call extraordinary, because it has no place in churches duly constituted. Next come Pastors and Teachers, with whom the Church never can dispense, and between whom, I think, there is this difference, that teachers preside not over discipline, or the administration of the sacraments, or admonitions, or exhortations, but the interpretation of Scripture only, in order that pure and sound doctrine may be maintained among believers. But all these are embraced in the pastoral office.
Thank God for the Restoration of the Gospel through a modern prophet, Joseph Smith, to help clarify the confusion within Christianity about the prophetic office, a confusion which, sadly, continues to exist in many circles today.