Jesus gives us a very unique window into the Holy Spirit's role in the life of the believer in John 16:7-15.
Here, Jesus speaks about the glorious mystery of the inner workings of God.
But very truly I tell you, it is for your good that I am going away. Unless I go away, the Advocate will not come to you; but if I go, I will send him to you. When he comes, he will prove the world to be in the wrong about sin and righteousness and judgment: about sin, because people do not believe in me; about righteousness, because I am going to the Father, where you can see me no longer; and about judgment, because the prince of this world now stands condemned.
“I have much more to say to you, more than you can now bear. But when he, the Spirit of truth, comes, he will guide you into all the truth. He will not speak on his own; he will speak only what he hears, and he will tell you what is yet to come. He will glorify me because it is from me that he will receive what he will make known to you. All that belongs to the Father is mine. That is why I said the Spirit will receive from me what he will make known to you.”
Based on this statement Jesus makes, we can unravel here that:
(1) "...I will send Him to you." Jesus sent the Holy Spirit. It was out of His going to sit at the right hand of the Father that we have an Advocate and Counselor.
(2) "...He will convict the world..." The Holy Spirit convicts the world of sin, righteousness, and judgment.Now I'll stop here for a second - a lot of the time I want to convict people of sin, but Jesus tells me right here that that's not my role. It's the role of God through the Holy Spirit to convict others of their wrong doing.
(3) "...He will guide you into all truth." This is interesting because another term for the Bible is the book of Truth. So, as the Holy Spirit will lead us, it will often be inspired to do so through Scripture.
(4) "...He will not speak on His own..." The Holy Spirit is not an independent being. He relies on the word of the Father and the Son to relay to His people. The Triune God does not work outside of Himself, and will never work contrary to Himself. There have been MANY cults that have began and maintain themselves because the leader somehow has this special connection to God that no one else has. Jesus already spoke here that the Spirit does nothing outside of the will of God, which can be tested in Scripture.
(5) "He will...declare to you what is to come..." The Holy Spirit is revelatory! He speaks about the future and gives believers a window into eternity. Often in our worship, I think about what heaven will be like. When we sing together to worship God as a church, we are getting a unique window into eternity and I'm so excited, knowing that one day our God will stand before us, and we will worship in His very presence. I just can't wait.
(6) "He will glorify Me..." The Holy Spirit takes what is Christ's and gives it to us; Christ takes from the Father, and gives it to the Spirit. This here is a wonderful picture of how the Trinity works, and the beauty isn't just of their giving and glorifying of one another, but that each member works for the betterment of the believer.
I know it can be a lot when talking about the Trinity, but it is important that we understand because we can often focus on one member over another; if we do, we can get ourselves into trouble if we don't keep a right balance of our Triune God in our minds.