Jesus is telling his disciples final things they need to know before he goes to the cross (V. 4). He is telling his disciples about the fact that he is about to die and go be with the Father in heaven (V. 5). The disciples are said to hear this because they don’t understand yet what Jesus came to do (V. 6)
However, he wants them to know that it is good for them that Jesus should go to the cross. Because if Jesus doesn’t die on the cross then the Helper (Holy Spirit) won’t come to them (V. 7). And when he does come he will convict the world of sin, will show that righteousness is found in God through Christ, and that judgment has come to the world and that people need a Savior (V. 8-11).
When the Holy Spirit comes he will teach the disciples (and God’s people) things that they are not ready to hear while Jesus is still on earth, and he will guide God’s people into all truth, as he teaches us the things that come from the Father through Christ (V. 12-14).
Jesus in verse one says that he has said all of these things to keep the disciples, and us, from falling away. He is continually trying to prepare his disciples for life without him because he knows that his time is about to come when he will die on the cross. This section is also expanding on what he has said about the Holy Spirit in John 14:15-31.
Even though this section is about the Holy Spirit, Jesus is still the center of how the triune God has chosen to interact with his people. Even though he is taking about the Holy Spirit coming he is coming to declare the words and truths of the Father that come through Jesus since he is the Word. That is why Jesus says in verse 15: “All that the Father has is mine; therefore I said that he (Holy Spirit) will take what is mine and declare it to you.” The Holy Spirit teaches us and guides us in the words and truths of Jesus. This is also a reaffirmation that Jesus and the Father are one and that Jesus is God just like the Father.
That we should rejoice at the reality that Jesus went to the cross, not only to open the way to the Father for us, but also because he provided us with the Holy Spirit who not only convicts of sin, but also teaches us and guides us in the words and ways of Jesus. We also know that the Holy Spirit is the power of God and that power now seals us and lives within us (Eph. 1:3; Acts 1:8).
As God’s people we have his amazing Holy Spirit guiding us, teaching us, and living within us. This means that the power of God is ours, and we need to live believing that God will and is leading us, and that he will teach us and give us all that we need for life, godliness, and joy in Christ. This means that we should not be people that worry or live in fear, but should instead live and believe that we are empowered by Christ through the Holy Spirit to live a full life of faith and Joy that is for the glory of God. And it also means that we should live a life of risk where we are willing to step out in faith and take chances because we know our God is guiding us, teaching us, leading us, and protecting us every step of the way.