The purpose of the Holy Spirit to the believer
To abide with you forever.
(…that He may abide with you forever John 14:16c NKJV), (…and make Our home with him. John 14:23e NKJV) - To make home, to remain.
To dwell with you.
(…or He dwells with you… John 14:17d NKJV) - To live with you.
To be in you.
(…will be in you. John 14:17d NKJV).
Note: We are looking at two aspects here. He will be with us (not temporarily – to remain, to make home, to live with) and in us.
To guide us into all truth – because He is the Spirit of Truth.
(…He will guide you into all truth; John 16:13a NKJV).
To teach you all things.
(…He will teach you all things…John 14:26d NKJV).
To bring to your remembrance all things that Jesus Christ has said to you
(…and bring to your remembrance all things that I said to you. John 14:26e NKJV).
To convict the world of righteousness, and of judgment.
(…and of righteousness, and of judgment: of righteousness, because I go to My Father and you see Me no more; of judgment, because the ruler of this world is judged. John 16:8c/d, vs 10, vs 11 NKJV).
To glorify Christ.
(He will glorify Me, for He will take of what is Mine and declare it to you. All things that the Father has are Mine. Therefore I said that He will take of Mine and declare it to you. John 16:14-15 NKJV).
The purpose of the Holy Spirit to the unbeliever
To convict of sin (…He will convict the world of sin…: of sin, because they do not believe in Me; John 16:8b, vs 9 NKJV)