There are many things that Jesus did not say. He said nothing about an extra dispensation, for example.
Jesus did not use the word dispensation because that word was not in common usage back in those times, so nobody would have even understood what Jesus meant by that. But Jesus did say there were
many things left to say and do in the future, things that could not be said back then because people were not yet ready to hear them… And since we know that Jesus was not going to be the one doing them (John 14:19, John 17:11, John 17:4, John 19:30) we know it was going to be somebody else who Jesus referred to as the Comforter and the Spirit of Truth.
John 16:12-13 I have yet many things to say unto you, but ye cannot bear them now. Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come.
John 14:26 But the Comforter, which is the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you.
John 15:26 But when the Comforter is come, whom I will send unto you from the Father, even the Spirit of truth, which proceedeth from the Father, he shall testify of me:
John 16:14 He shall glorify me: for he shall receive of mine, and shall shew it unto you.
Baha’u’llah did everything Jesus said the Comforter would do.
The Church taught Christians to believe that the Comforter and Spirit of truth were the Holy Spirit that Jesus sent on the day of Pentecost to live
inside of them, but (1) the Holy Spirit that was sent at Pentecost was only sent to the disciples, and (2) a spirit living inside of people could not do any of the following things that are in John 14, 15 and 16; only a man could do those things, and that is why the verses are prefaced by what “he” will do.
- Teach you all things
- Call to remembrance what Jesus said
- Testify of Jesus
- Glorify Jesus, receive of Jesus, and shew it unto you
- Guide you into all truth
- Speak what He hears and shew you things to come
- Reprove the world of sin, and of righteousness, and of judgment
Baha’u’llah did
all these things and as a result of His revelation the world will be reproved the world of sin, and of righteousness, and of judgment. No spirit living inside of Christians is going to do this.
"World" (κοσμος) has a number of meanings in Scripture. It can mean "every human being without exception" and it can mean "non-believing humanity" (John 17:9)-- to name just two.
What the word world means depends upon the context in which the word is used.
John 14:19 Yet a little while, and the world seeth me no more; but ye see me: because I live, ye shall live also.
John 17:11 And now I am no more in the world, but these are in the world, and I come to thee. Holy Father, keep through thine own name those whom thou hast given me, that they may be one, as we are.
Obviously Jesus was referring to the
earth, because that is where Jesus was when He said that, where Jesus would no longer be, and thus where Jesus would no longer be seen. The verse would not make any sense if you attributed any other meaning to the word "world."