He prepared them as best he could, but there was still so much that they did not comprehend....this is why he told them not to leave Jerusalem but to wait for the "helper". (Acts 1:3-5) This would mean a baptism in holy spirit, revealing the full extent of their choosing and giving them extraordinary abilities.
This was the promised holy spirit. After Jesus presented the value of his sacrifice to God in heaven, only then was the holy spirit used to empower the disciples with miraculous gifts, but it also anointed them for a specific role in heaven. This was something very new for them to comprehend. For Jews, the Kingdom had been something to be set up on earth, so to give it a new connotation required God's spirit to endow the disciples with a new hope.....the spirit gave them an inordinate desire to go to heaven. This had to override their natural desire to live in the restored paradise on earth which was the promise of Messiah's kingdom, with Jews making up the priesthood in a literal temple. That was now something that would take place in heaven. It would be a heavenly government with earthly subjects. (
Revelation 21:2-4)
The helper was not human. The holy spirit is not a person; it is the power of God given to those who are chosen to rule with his son in the heavenly kingdom.
Since the "Paraclete" is not a person, it does not refer to any human.
The Holy Spirit—A Person? — Watchtower ONLINE LIBRARY
John 14:15-16....
"and I will request the Father and he will give you another spokesman to be with you forever, 17 the Spirit of Truth, which the world cannot receive because it does not perceive nor know it; you know it, because it stays with you and is in you." (BLE)
The Spirit of the Truth is an "it" and "Paraclete" is used in the masculine gender because of grammar, not because the Paraclete is a human male.
Concerning
1 John 2:1, Jesus is referred to as a helper because he is the appointed "mediator between God and men".....'no one comes to the Father, except through Jesus'. His sacrifice alone opens up the way to heaven. That leaves out any other person claiming to be the returned Christ. His return was not to be in the flesh, only to die a second physical death. That would negate why he came to give up his life the first time.
Jesus was a Comforter because Jesus brought the Holy Spirit. Muhammad was another Comforter and He was also the Spirit of truth.
John 14:16 And I will pray the Father, and he shall give you another Comforter, that he may abide with you for ever;
John 14:17 Even the Spirit of truth; whom the world cannot receive, because it seeth him not, neither knoweth him: but ye know him; for he dwelleth with you, and shall be in you.
It makes no sense that the Comforter is a disembodied Holy Spirit because a disembodied Holy Spirit cannot do the things mentioned in the following verses.
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 16:8 And when he is come, he will reprove the world of sin, and of righteousness, and of judgment:
John 16:13-14 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. He shall glorify me: for he shall receive of mine, and shall shew it unto you.
Muhammad did all these things as Jesus promised He would.