The Holy Spirit is probably the most misunderstood personality of the trinity. A lot of people think of the Holy Spirit as an it – a thing – but the Holy Spirit is a personality. In this passage it says, He will guide you, not it will guide you. A lot of Christians think of the Holy Spirit as this cosmic, mystical cloud that hovers around God but the Holy Spirit is the third person of the trinity. He is fully God. The Bible tells us the role of the Holy Spirit in our lives.
“When the Spirit of truth comes, He will guide you into all truth. He will not speak on His own but will tell you what He has heard. He will tell you about the future. He will bring Me glory by telling you whatever He receives from Me. All that belongs to the Father is Mine; this is why I said, ‘The Spirit will tell you whatever He receives from Me.’” John 16:13-15.
Throughout history mankind has searched for the meaning of truth. In John 18:38 Pilate rhetorically says to Jesus, “What is truth?” as though truth is something abstract and unknowable. Even in a world of relativism, followers of Christ have been given the truth through God’s Spirit. Jesus said, “I am the way, the truth, and the life” (John 14:6) and it is the role of the Holy Spirit to point us to that truth.