Based on Luke 3:22 & 1:39-41, Genesis 1:2, the 'Holy Spirit' was already here, so who does John 16:7, 16:13-14, John 14:26 talk about?

Thank you for your question. In researching for an answer I learned some quite interesting things. For example I learned that in your referenced Scriptures there were two separate comforters. The first being the reincarnate Christ and the other being The Holy Spirit. In the following paragraphs I reference Scriptures that lead me to that conclusion.

John 14:16 through 20 And I will pray the Father, and he shall give you another Comforter, that he may abide with you for ever; 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. I will not leave you comfortless: I will come to you. 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. At that day ye shall know that I am in my Father, and ye in me, and I in you.

Here we see that Jesus is referring to himself after he has conquered death by sacrificing himself as the son of man (or his human body) as sacrifice for the sins of the World. All sin for all time. We sere here that Jesus plans to pray to the father to send another comforter. He describes this other comforter as the Spirit of truth. He further identifies this other comforter as ye know him; for he dwelleth with you, and shall be in you (now that he has given them the truth it is a part of them forever). this is further elaborated in the following Scripture.

John 10:36 through 38 Say ye of him, whom the Father hath sanctified, and sent into the world, Thou blasphemest; because I said, I am the Son of God? If I do not the works of my Father, believe me not. But if I do, though ye believe not me, believe the works: that ye may know, and believe, that the Father is in me, and I in him.

He further explains in:

John 14:19 and 20 Yet a little while, and the world seeth me no more; but ye see me: because I live, ye shall live also. At that day ye shall know that I am in my Father, and ye in me, and I in you.

Here he tells us that in Eternity our spirits will combine with his.

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.

This comforter unlike the Spirit of truth serves a different mission. His function is to educate and cause them to remember the things that Jesus taught them while here on Earth.

These are my conclusions from carefully studying those scriptures and in reference to some of my reference materials, such as David Guzik, F.B.Meyer and others.

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The Holy Spirit. along with the Father and Son, possesses every attribute of God. He, like them, is omniscient, omnipresent, omnipotent, immutable, and so much more.

As with the Son, however, the role of the Holy Spirit in salvation history has changed. He has not changed, but his role changed, ever since God chose to involve himself in the affairs of his creatures, particularly the human species, who bear his image. That is because prior to God's creative work, there was no such thing as history. God's plan of salvation existed from eternity in the eternal counsels of God.

Once the infinite and eternal God chose to enact salvation's plan (which was in God's mind a fait accompli!), he identified with his creatures in their finitude and their history over time, from the beginning to the very end, from

"In the beginning God" (Genesis 1:1)

to

"a new heaven and a new earth” (Revelation 21:1);

from an eternal kingdom which appeared in time to a kingdom which will extend into eternity; when

"the kingdoms of this world have become the kingdom of our Lord and of his Christ, and he shall reign forever and ever" (Revelation 11:15).

All this to say, Christians should not be surprised that the Holy Spirit's involvement in the outworking of God's plan of salvation is a bit mysterious.

Prior to his coming in power on the day of Pentecost, when

Suddenly a sound like the blowing of a violent wind came from heaven and filled the whole house where they were sitting [, and t]hey saw what seemed to be tongues of fire that separated and came to rest on each of them [, and a]ll of them were filled with the Holy Spirit and began to speak in other tongues as the Spirit enabled them (Acts 2:2-4),

the Holy Spirit's presence and power were manifest primarily through a chosen few who were temporally led and filled by the Spirit primarily in their roles as prophets, priests, and kings. Moreover, through a group even fewer in number, God's Spirit breathed out God's eternal written word (see 2 Peter 1:20-21, and 2 Timothy 3:16).

Only with the coming of the Holy Spirit on the day of Pentecost did he thereafter come to indwell God's chosen ones forever. Heretofore, the Spirit came upon people intermittently to accomplish what they could not accomplish in their own strength.

Often, that manifestation of the Holy Spirit involved miracles: from making a donkey able to talk (Numbers 22:18), to raising people from the dead (e.g., 1 Kings 17:17 ff.); from forth-telling God's word with exactitude (e.g., 1 Kings 17:14--"thus saith the LORD"), to foretelling God's word in exquisite detail (e.g., Isaiah 7:14; 9:6; and 53:1 ff.)

With his coming on Pentecost, true believers in Jesus Christ were regenerated and then baptized into the body of Christ (see Titus 3:4b-7). Jesus foretold of this recurring phenomenon to his disciples during Passion Week as a way to prepare them for his imminent--yet temporary--departure from Earth (John 14 and 16, passim).

In conclusion, the personhood of the Holy Spirit has been and will be the same from eternity past to eternity future. In helping to bring to pass the will of God, he adapted his methodology to temporal situations, but always according to an unchanging theology. Christians for centuries have taken their cues from the Holy Spirit as they are led by him to change and adapt their methodology in performing God's kingdom work here on earth. They also need, however, regardless of methods, to be in agreement with the Holy Spirit's goal of magnifying the person and work of their God and Savior, Jesus Christ, to the glory of God (e.g., John 16:15).