Jesus speaks of the HS as another. The Father does not.
“I am sending you out like sheep among wolves. Therefore be as shrewd as snakes and as innocent as doves.
17Be on your guard; you will be handed over to the local councils and be flogged in the synagogues.
18On my account you will be brought before governors and kings as witnesses to them and to the Gentiles.
19But when they arrest you, do not worry about what to say or how to say it. At that time you will be given what to say,
20for it will not be you speaking,
but the Spirit of your Father speaking through you.
The Fathers promise
“’In the last days, God says, I will pour out
my Spirit on all people. Your sons and daughters will prophesy, your young men will see visions, your old men will dream dreams.
The Spirit of Christ in the believer.
“All this I have spoken while still with you.26 But the Advocate, the Holy Spirit,
whom the Father will send in my name, will teach you all things and will remind you of everything I have said to you
As I stated in regard to the Spirit of God. I see the person of the Father and, (Son in certain contexts), not any 3rd distinct person that has their own will and mind.
As you also stated, "Jesus speaks of the HS as another." But, what else does Jesus say when he says that?
Joh 14:16 And I will ask the Father, and he will give you
another Helper, to be with you forever,
Joh 14:17 even
the Spirit of truth, whom the world cannot receive, because it neither sees him nor knows him. You know him, for he dwells with you and will be in you. (ESV)
…
Joh 14:26 "But the
Helper, the Holy Spirit, whom the Father will send in My name, He
will teach you all things, and
bring to your remembrance all that I said to you." (ESV)
Joh 15:26 “But when
the Helper comes,
whom I will send to you from the Father,
the Spirit of truth,
who proceeds from the Father,
he will bear witness about me. (ESV)
Joh 16:7 Nevertheless, I tell you the truth: i
t is to your advantage that I go away, for if
I do not go away, the Helper will not come to you. But if I go, I will send him to you.
Joh 16:8 And when he comes, he will convict the world concerning sin and righteousness and judgment:
Joh 16:9 concerning sin, because they do not believe in me;
Joh 16:10 concerning righteousness, because
I go to the Father, and you will see me no longer;
Joh 16:11 concerning judgment, because the ruler of this world is judged.
Joh 16:12 “I still have many things to say to you, but you cannot bear them now.
Joh 16:13 When the Spirit of truth comes,
he will guide you into all the truth, for he will not speak on his own authority, but
whatever he hears he will speak, and
he will declare to you the things that are to come.
Joh 16:14 He will glorify me, for
he will take what is mine and declare it to you.
Joh 16:15 All that the Father has is mine; therefore I said that
he will take what is
mine and declare it to you. (ESV)
Jesus says the Holy Spirit is “another Helper.” That implies both that Jesus is the first “Helper” and that the Holy Spirit is one who is like him but distinct from him, which implies personhood. That is the plain reading of the text.
And what is a "Helper"? When we look at the Greek, it is the word
parakletos, which means "helper, counselor, comforter, advocate;" all of which either are or can be actions of persons. The meaning of advocate is important since persons advocate on behalf of other persons; "its" cannot advocate for anyone or anything.
Parakletos is used only five times in the NT. In addition to the above four instances in John, the fifth is also by John here, for "advocate":
1Jn 2:1 My little children, I am writing these things to you so that you may not sin. But if anyone does sin, we have an
advocate with the Father, Jesus Christ the righteous. (ESV)
Jesus is said, by John, to be an advocate. It is not insignificant, then, that John records Jesus saying that he will send "another
parakletos." Jesus was the first
parakletos, and remains so, but in John’s gospel he was returning to the Father and the disciples still needed much help and guidance. It all points to the Spirit being a person and also being truly God, in the same way Jesus is truly God.
An advocate
can only be a person. We also see in these passages that the actions of this other Helper include teaching, bringing things to remembrance, bearing witness, convicting of sin, guiding into all truth, hearing, and speaking and declaring. These are actions of personal agency, not an "it." Jesus also says it is for their advantage that he leaves and sends this Advocate. How is it, then, that having an "it" would be to their advantage? Could a chair, rock, or impersonal power do any of these things or be of an advantage when Jesus left?
Additionally, the Holy Spirit:
Acts: Matt 4:1; Acts 8:39, 16:7
Listens: John 16:13
Speaks: John 16:13-15; Acts 1:16, 10:19, 11:12, 11:28, 13:2, 15:28; 1 Tim 4:1; Heb 3:7
Can be lied to: Acts 5:3, which is the same as lying to God (5:9)
Bears witness: Rom 8:16; Heb 10:15; 1 John 5:6
Helps, intercedes, and searches: John 14:16, 15:26, 16:7; Rom 8:26-27; 1 Cor 2:10
Teaches: Luke 12:12; John 16:13; 1 Cor 2:13
Gives gifts: Acts 20:28; 1 Cor 12:11; Heb 2:4
Leads: John 16:13; Gal 5:18, Heb 9:8
Can be grieved: Eph 4:30
Can be outraged: Heb 10:29
Can be blasphemed: Matt 12:31-32
Convicts: John 16:8-11
These are all actions of personal agency. Everything about the Holy Spirit in these passages strongly imply that the Holy Spirit is a divine person who is distinct from the Father and the Son.