Except I have no reason to accept your scriptures as valid or in any way inspired by God.
Well, you asked me for evidence about Baha'u'llah being the promised one in Hebrew Scriptures. Let me ask you; if someone asks you what evidence you have Jesus is Messiah, what evidence you provide?
I suppose the best evidence is what New Testament provides. So you give new testament. The person tells you: "I have no reason to accept your scriptures as valid or in any way inspired by God". Well, sure, but you are free to study and investigate the evidence and decide for yourself if its true or not. Likewise you asked me, what evidence I have. The evidence is in Baha'i Scriptures, should you wish to study, investigate and decide for yourself on their truth.
And Isaiah 9 is a Messianic prophecy.
These Prophecies are related to second coming.
"Of the increase of his government and of peace there will be no end, on the throne of David and over his kingdom, to establish it and to uphold it with justice and with righteousness from this time forth and forevermore. The zeal of
the LORD of hosts will do this." Isaiah 9:7
Baha'u'llah is the Lord of Hosts:
"The third woe is the great day of the manifestation of the Lord of Hosts and the radiance of the Beauty of the Promised One. The explanation of this subject, woe, is mentioned in the thirtieth chapter of Ezekiel, where it is said: “The word of the Lord came again unto me, saying, Son of man, prophesy and say, Thus saith the Lord God; Howl ye, Woe worth the day! For the day is near, even the day of the Lord is near.” 23
Therefore, it is certain that the day of woe is the day of the Lord; for in that day woe is for the neglectful, woe is for the sinners, woe is for the ignorant. That is why it is said, “The second woe is past; behold the third woe cometh quickly!” This third woe is the day of the manifestation of Bahá’u’lláh, the day of God; and it is near to the day of the appearance of the Báb. "
Bahá'í Reference Library - Some Answered Questions, Pages 45-61
One of Jesus' missions was to establish a church which would convey the Gospel--the Good News of Jesus Christ, Who He is, and what He did for us. If His Church failed, if the ones He appointed to lead His church fell into error, then Jesus' promise about the Church never falling was empty. His promise that the Holy Spirit would be with us forever and guide us into all truth was a lie. If His Church crumbled, then Jesus failed in establishing it forever.
Except by Church, Jesus did not mean a Christian denomination. He meant religion of God, and of course that Church now exist as Baha'i Faith.
"Christ wished by suggestion, or an allusion, to confirm the words of Peter; so on account of the suitability of his name, Peter, He said: “and upon this rock I will build My church,” meaning, thy belief that Christ is the Son of the living God will be the foundation of the Religion of God, and upon this belief the foundation of the church of God—which is the Law of God—shall be established." Some Answered Questions, Abdulbaha
So Jesus saying that He was speaking figuratively is the only non-figurative thing that He ever told His Apostles? Then how in Hades were the Apostles expected to preach the good news about Jesus when they couldn't even understand what the good news was? Why did Jesus trick them into speaking lies and falsehoods about exactly Who their Teacher was?
The good news that Apostles were preaching, was related to the first coming of Christ, and they did understood it. But all those things that directly or indirectly were related to the second coming of Christ, was revealed in figurative language. I believe the apostles knew their meanings, but they were not allowed to reveal them plainly. Other things like the story of Lazarus, was intentionally written in symbolic language, as a test. If we read it with spiritual eye, then the veil is removed from our eye, and we can see its spiritual and inner meaning. God tests us by the scriptures, and one way of testing is by symbolic language.
No, they would have dealt with it just fine. They'd already seen Jesus risen physically from the dead, and He had already opened their hearts to understand the Hebrew Scriptures. After that, they were ready to believe whatever He told them. Had He told them that another prophet was coming, they would have believed Him.
I think we went through this a couple of times already.
That the Father that Christ was speaking, was to Manifest Himself on the Day of Resurrection.
Have you ever taken a basic astronomy course? Here's what the term "celestial body" means:
"the signs and conditions which have been spoken of all have meanings, and are not to be taken literally. Among other things it is said that the stars will fall upon the earth. The stars are endless and innumerable, and modern mathematicians have established and proved scientifically that the globe of the sun is estimated to be about one million and a half times greater than the earth, and each of the fixed stars to be a thousand times larger than the sun. If these stars were to fall upon the surface of the earth, how could they find place there? It would be as though a thousand million of Himalaya mountains were to fall upon a grain of mustard seed. According to reason and science this thing is quite impossible. What is even more strange is that Christ said: “Perhaps I shall come when you are yet asleep, for the coming of the Son of man is like the coming of a thief.”‡ Perhaps the thief will be in the house, and the owner will not know it.
It is clear and evident that these signs have symbolic signification, and that they are not literal. They are fully explained in the Kitáb-i-Íqán. Refer to it."
Some Answered Questions, Abdulbaha
So when I say "celestial bodies", I mean things like "sun, moon, stars". This is the standard definition of what the term means.
There is a metaphoric meaning for these celestial bodies.
"Then the righteous will shine like
the sun in the kingdom of their Father. Whoever has ears, let them hear." Matthew 13:43
"The sun has one kind of splendor, the moon another and the stars another; and star differs from star in splendor. So will it be with the resurrection of the dead." 1 Corin. 15:42
Meaning when the next Manifestation of God comes, on the Day of Resurrection, to awake the spiritually dead, some will rise like Sun, some like Moon, and some like stars....However, those religious leaders who do not recognize Him, their light is faded and are fallen stars (like Christian Leaders at the time of Baha'u'llah)
Except with your argument, the Church DID fail right away, because from the start the Apostles and their students were teaching that Christ rose literally from the dead, He would return physically and raise everyone up from physical death by a physical resurrection and then the world would end, Jesus is God, God is a Trinity, Jesus is truly God and truly man, and the list goes on. If what you say about Christianity is true, it didn't take centuries for Christianity to fall away. It took days.
Not all the early Christians understood these literally. Those who understood their figurative meaning, were not allowed to reveal their meaning, until the second coming Christ, He Himself would reveal it, in its own time. As the Book of Revelation says, only Christ is worthy to unseal the Book of God and reveal its mysteries.