“When the Spirit of truth comes, he will guide you into all the truth, for he will not speak on his own authority, but whatever he hears he will speak, and he will declare to you the things that are to come.” – John 16:13 (ESV)
We learn through these passages and others that a primary objective of the Holy Spirit of God was to reveal truth. For three years Jesus had taught and demonstrated by example who He was and the program of God as it would be worked out. Recorded in chapter 14, that same evening, Jesus had said, The Helper, the Holy Spirit, … he will teach you all things and bring to your remembrance all that I have said to you.” It was not going to be possible for the apostles and disciples to remember all that they had be taught and would proclaim by to the nations. Especially those who would be authors of the books and letters in the New Testament. That was the role of the Holy Spirit. One God indivisible, The Spirit was with the Father and the Son. The Holy Spirit would be the one to convey to the apostles and others who would be used to record what the Father says and the Son did. It was what made the inspired scriptures truly the Word of God. All that they remembered and all that was revealed to them would come through the Spirit of truth.