Are there new Revelations by prophets today?

John Calvin wrote an excellent commentary in his "Institutes of the Christian Religion" about this topic. His main argument is that Christ is the all-sufficient and complete revelation of God. Those who are in Him has no need for any additional revelation or prophecy to be a more complete Christian. The Bible reveals a Scripture-alone theology, not a Scripture-plus theology. Scripture is the complete revelation about Christ. We must immerse ourselves in Scripture alone and not seek extra biblical revelations through any other means.

Here follows Calvin's commentary on this topic.

"For in [Christ] 'all treasures of knowledge and wisdom are hid' (Col. 2:3) with such great abundance and richness that either to hope for or to seek any new addition to these treasures is truly to arouse God's wrath and provoke him against us. It is for us to hunger for, seek, look to, learn, and study Christ alone, until that great day dawns when the Lord will fully manifest the glory of his Kingdom (cf. I Cor. 15:24) and will show himself for us to see him as he is (I John 3:2). And for this reason this age of ours is designated in the Scriptures as 'the last hour' (I John 2:18), the 'last days' (Heb. 1:2), the 'last times' (I Peter 1:20), that no one should delude himself with a vain expectation of some new doctrine or revelation. 'For at many times and in many ways the Heavenly Father formerly spoke through the prophets; but in these last days he has spoken in his beloved Son' (Heb. 1:1-2), who alone can reveal the Father (Luke 10:22); and he has indeed manifested the Father fully, as far as we require, while we now see him in a mirror (I Cor. 13:12)" (Institutes 4.18.20).

"This, however, remains certain: the perfect doctrine he has brought has made an end to all prophecies. All those, then, who, not content with the gospel, patch it with something extraneous to it, detract from Christ's authority. The Voice that thundered from heaven, 'This is my beloved Son; ... hear him' (Matt. 17:5; cf. Matt. 3:17), exalted him by a singular privilege beyond the rank of all others. Then this anointing was diffused from the Head to the members, as Joel had foretold: 'Your sons shall prophesy and your daughters ... shall see visions,' etc. (Joel 2:28). But when Paul says that He was given to us as our wisdom (I Cor. 1:30), and in another place, 'In him are hid all the treasures of knowledge and understanding' (Col. 2:3), he has a slightly different meaning. That is, outside Christ there is nothing worth knowing, and all who by faith perceive what he is like have grasped the whole immensity of heavenly benefits. For this reason, Paul writes in another passage: 'I decided to know nothing precious ... except Jesus Christ and him crucified' (I Cor. 2:2). This is very true, because it is not lawful to go beyond the simplicity of the gospel. And the prophetic dignity in Christ leads us to know that in the sum of doctrine as he has given it to us all parts of perfect wisdom are contained" (Institutes 2.15.2).

"And when he speaks of the last times, he intimates that there is no longer any reason to expect any new revelation; for it was not a word in part that Christ brought, but the final conclusion. It is in this sense that the Apostles take ' the last times' and 'the last days.' And Paul means the same when he says, 'Upon whom the ends of the world are come' (I Cor. 10:11). If God then has spoken now for the last time, it is right to advance thus far; so also when you come to Christ, you ought not to go farther: and these two things it is very needful for us to know. For it was a great hindrance to the Jews that they did not consider that God had deferred a fuller revelation to another time; hence, being satisfied with their own Law, they did not hasten forward to the goal. But since Christ has appeared, an opposite evil began to prevail in the world; for men wished to advance beyond Christ. What else indeed is the whole system of Popery but the overleaping of the boundary which the Apostle has fixed? As, then, the Spirit of God in this passage invites all to come as far as Christ, so he forbids them to go beyond the last time which he mentions. In short, the limit of our wisdom is made here to be the Gospel" (Comm. on Heb. 1:1).

7 Proofs that there are no new revelations by prophets today.

Here follows 7 strong arguments against new revelation outside of Scripture - extra biblical revelation. These arguments also proof that no new apostles and prophets are appointed today by Christ.

1. There is a general biblical taboo against seeking new revelation (Isaiah 8:19-20; 19:3; 29:4; 47:12, 13; Leviticus 19:31; 20:6; 2 Kings 21:6; 23:4; 1 Samuel 28:8ff.).

2. We have clear warning that many false prophets will come and try to add to the Bible, but that the church should carefully guard against such perversion (Matt. 24:24; Jude 3; Acts 20:28-32; 2 Corinthians 11:13-15; 2 Timothy 4:3, 4).

3. The nature of Christ’s promises of future revelation offer proof that Revelation ceased with the New Testament. He told of coming revelation that the Holy Spirit would reveal to the disciples (John 16:13, 14; 14:26). The Apostles acknowledged receiving that revelation (1 Corinthians 2:10-13). Finally, Jesus said revelation was then final (Revelation 22:18-20).

4. There are Bible statements that indicate revelation is terminated (1 Corinthians 2:9, 10; Hebrews 1:1, 2; 2:1-4; John 17:4, 8; 15:15; Jude 3). “God, after He spoke long ago to the fathers in the prophets in many portions and in many ways, in these last days has spoken to us in His Son” – underline mine (Hebrews 1:1, 2). The Greek scholar Robertson comments on “has spoken,” saying that it means “’did speak’ in a final and full revelation.” There is a powerful contrast set up between these two avenues of revelation. In the Old Testament times revelation from God was continuous, whereas in stark contrast, the revelation in Jesus Christ is full, complete, and final.

5. There are Bible statements that indicate the Bible is adequate for our faith and practice, and that no new revelation is needed to help us grow in Christ, or to know His will (John 17:17, 20; 2 Peter 1:3, 4; 2 Timothy 3:15-17).

6. The sixth line of argument to exhibit that special revelation from God was terminated with the New Testament. There is the historical testimony of the church regarding the closed canon of Scripture. The canon refers to those 66 books that make up the Bible that was eventually formally recognized at the Council of Carthage in A.D. 397. Later I will go into detail how the canon was formed. The reality of the closed canon offers evidence that the Christian church from the beginning considered the matter of revelation from God to be a closed matter with the end of the book of Revelation. That great document of the church that resulted from the Reformation, the Westminster Confession of Faith (A.D. 1647) makes the point clear. It reads, “The whole counsel of God, concerning all things necessary for his own glory, man’s salvation, faith, and life, is either expressly set down in scripture, or by good and necessary consequence may be deduced from scripture: unto which nothing at any time is to be added, whether by new revelations of the Spirit or traditions of men” (Chapter I, Article VI).

7. It is the severe prohibition and condemnation of further revelation beyond the book of Revelation, “I testify to everyone who hears the words of the prophecy of this book: if anyone adds to them, God hall add to him the plagues which are written in this book; and if anyone takes away from the words of the book of this prophecy, God shall take away his part from the tree of life and from the holy city, which are written in this book” (Revelation 22:18,19). The message could not be plainer and to the point: special revelation has ceased! There is not a clearer and stronger “the end” that the Holy Spirit could have appended to the end of His Book. God condemns, in this passage, anyone who adds or subtracts from the words of the Bible. There are those, however, who say this warning applies only to the book of Revelation, but not to the rest of the Bible. In some cases the reasoning goes that since the warning only applies to the book of Revelation, then they can add or tamper with the rest of the New Testament. I reply: the warning does apply to the whole Bible, because it is intimately linked to the whole Bible.