God the Holy Spirit
Who is He?
Christ having spoken of the great opposition which his gospel was likely to meet with in the world, and the hardships that would be put upon the preachers of it, lest any should fear that they and it would be run down by that violent torrent, he here intimates to all those that were well-wishers to his cause and interest what effectual provision was made for supporting it, both by the principal testimony of the Spirit (v. 26), and the subordinate testimony of the apostles (v. 27), and testimonies are the proper supports of truth
The Holy Spirit is the third member of the Triune God and, as such, is fully God and fully personal.
What is His Role
As a person, he can be grieved and lied unto (Isa 63:10; Eph 4:30; Acts 5:3–4); he leads believers (Gal 5:17); he enables prayer (Jude 20; Eph 6:18); he even prays (Rom 8:26–27).
Why is the Holy Spirit sent to be with us?
13 “But when He, athe Spirit of truth, comes, He will bguide you into all the truth; for He will not speak on His own initiative, but whatever He hears, He will speak; and He will disclose to you what is to come.
14 “He will aglorify Me, for He will take of Mine and will disclose it to you.