Testimony of Jesus
"...For the testimony of Jesus is the spirit of prophecy." (Revelation 19:10). In John 1:1, Jesus was given the title of the "Word of God" indicating that Jesus, the Messiah, had words from His Father and came to share these word with the world; to reveal the instruction man needed from the Creator Jehovah, to all who would listen. The testimony of Jesus is the entire Bible, Christ was the author by inspiration to all the writers, from Moses to John, "A revelation of Jesus Christ, which God gave to Him to show to His slaves things which must occur quickly..." (Revelation 1:1). The entire Bible is a testimony to us from God's Son, through His chosen writers, to educate us as to the messages from our Father, to warn us of things to come and to instruct us in the direction toward salvation. The Old Testament is filled with examples of man's weaknesses and outlines God's code of righteousness and gave us prophecies of things that are to come, including the arrival of the Messiah. The New Testament pointed the way to salvation, instructions and prophecies for us to prepare ourselves for the coming judgment. The Book of Life is a list of those that responded to God's warnings and were purified by the blood of the Lamb, those who kept the law of God, "Here is the patience of the saints; here are the ones keeping the commands of God and the faith of Jesus." (Revelation 14:12).
The prophets of the Old Testament were a communication link between God and man, in both directions. God used His prophets to deliver information and instructions to mankind and men would seek a seer (as prophets were called) to ask God what He wanted them to do or not do, Joshua and David both asked prophets if they were to battle with a nation or to forego. Also, God would contact a prophet to give a message to someone or a particular group That wasn't the only duties of a prophet, sometimes they were instructed to display a message to certain peoples. In effect they, were an advocate, a communication link between the people and God. Since Christ's first advent and ascension, He became our Advocate, "My little children, I write these things to you so that you do not sin. And if anyone sins, we have an advocate with the Father, Jesus Christ, the righteous." (I John 2:1) and mediator, "For God is one, also there is one Mediator of God and of man, the Man Christ Jesus." (I Timothy 2:5). Unfortunately this message has not been taken to heart, a Pope and Priests have become mediators along with denomination that have adopted writers as prophets of God. Do we need more prophets as in the Old Testament? The Old Testament people had no books, just the written laws that God and Moses gave them, which were read to the congregation on the sabbaths to the Israelites in the temple. Since the appearance of Christ, He became our Advocate and He sends His Spirit to speak to each of us and gives us wisdom and understanding. Now, since then invention of the printing press, we have the word of God in book form given to us by Christ's inspiration to the many Bible writers, and the Son of God completed it, assembled it and gave us no indications that more messages from His Father were needed or forthcoming. What need is there for more prophets? Not to discourage anyone from reading what other men write or for writing something they want to share, but only if we maintain the responsibility of testing every word with God's word, then what could be a danger, can be put into the proper place and what is consistent with the Bible can be a blessing. His Book is the standard for truth, without exception and it is wise to know all His truth before venturing elsewhere in man's writings, because man is a useful tool in the hands of Satan and he often mixes a little error within much truth. We need to know truth so we can recognize error or we are at the mercy of Satan, who has no mercy, he wants us to join him at the his end, in the Lake of Fire.
It is the opinion of many, if not most all SDA, that Ellen White was a prophet and consider her every word to be inspired by Christ, and they call her words and writings the "Spirit of Prophecy" using Revelation 19:10 as reference for this belief. The verse doesn't say, the spirit of prophecy is the testimony of Jesus, clearly it says, "The testimony of Jesus is the Spirit of prophecy" the reverse isn't the same nor is the reverse true. ”Truly, I say to you, Not has arisen, among those born of a woman any greater then John the Baptist..." (Matthew 11:11), consider the verse after, "For all the prophets and the Law prophesied until John." (Matthew 11:13), this implies that John the Baptist was the last of the prophets because it states "all the prophets". Also, ”in these last days He spoke to us in the Son, whom He appointed heir of all..." (Hebrews 1:2). I don't know of any verse that indicates that there would be additional information and a need for another or more prophets to come. To consider this, especially after Christ assembled the Bible; would indicate that Christ forgot some information. Further light was to be given for some closed prophecies but another prophet was not mentioned nor is a prophet needed, understanding that Christ's Spirit is being sent for this purpose, to enlighten those who choose to seek God by Christ's words of truth and brightened by deeper understanding given by Christ Spirit.
We have no authority to declare who is a prophet. To consider a human's every word as to be inspired by Christ is beyond presumptuous and offensive. Every word needs to be tested with God's word. The original church went down that road and the damage is still in effect and its been added to without much recognition. The traditions of men from the thoughts of men existed during Christ visit and He warned us about relying on the traditions of men but we still continue to rely on our own imaginations more then God's perfect instructions. Visit a religious bookstore and you can't help being overwhelmed by the quantity of books about God and the Bible. Few Christians have read the Bible from front to back, even just once, and once is certainly not enough. Do we not trust in God's Spirit to bless us with correct understanding, that we need to reach out to other men for their presumed understanding? We can't follow any man (human) to the gates of Heaven, Jesus only is our Way to the Father and He gave us the way home in the written words of the Book He gave us, words that His Father gave Him to give to us, what need is there for other prophets, Christ is God's last Prophet, He came bearing God's messages and Christ put them in a Book, this is Christ's "testimony" as the verse says.