I suppose to an outside observer, there is no way to know which prophet or mystic will eventually have millions or billions of followers and scriptures that will be used for thousands of years in the future. Speaking personally, I feel a strong spiritual connection and am convinced in every way, heart and mind, that Baha’u’llah is a Universal Manifestation of God, according to the definition I provided above. It will take centuries before that is effectively proved out, because it has only been less than 200 years since His Revelation, so I appreciate that most people would assume Baha’u’llah is not different than many other mystics or lesser prophets, but to me there is a world of difference.
Then these nonbelievers ask me what the evidence is that Baha'u'llah was a Manifestation of God, whom I normally refer to as a Messenger. Below is an example of what I post, although there are many different variations, since I post to so many different people. All this evidence explains why Baha'u'llah was different than the many other mystics or lesser prophets, and why there is a world of difference.
Nobody can prove that anyone got messages from God, only the Messenger knows that. Whether we choose to believe the claim or not is based upon the evidence that supports the claim.
The evidence that Baha’u’llah was who He claimed to be is His character; the history of His life; what He did during His mission on earth; the scriptures that He wrote; what others have written about Him; the Bible prophecies that He fulfilled and the prophecies of other religions that He fulfilled; the predictions He made that have come to pass; the religion that was established as the result of His Revelation, what His followers all over the world have done and are doing now.
Baha’u’llah had a good character, an important mission on earth that was completed successfully, and scriptures that contain valuable information about God and other things we need to know in order to fulfill the purpose for our existence. Those scriptures have social teachings and laws for this new age in this new age and the blueprint instructions humanity needs to build the Kingdom of God on earth. There is a religion established by His followers who are living according to the teachings and laws and completing the tasks assigned by Him. Baha’u’llah fulfilled all the Bible prophecies that refer to the Messiah and the return of Christ, many of which are so specific and that they could not be fulfilled by anyone else in the future. On top of all that, Baha’u’llah made many predictions that came to pass.