When I read the Bible as a Christian I took this below section to mean someone else is coming. Later I learned this is supposed to be the Holy Spirit so I forgot about the passage. Sometime after becoming Muslim I’ve remember this, and still don’t see why more people don’t know about it. Now I wonder why it took three years for someone to mention it as part of answering your question.
John 16:13-15New International Version (NIV)
13 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. 14 He will glorify me because it is from me that he will receive what he will make known to you. 15 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.”
From my point of view run on sentences in the Bible come from add ons to help explain or convince people of some ones point of view. Man was I mad (or distraught/disturbed) when I figured out Islam was the right religion, and so happy that much of the truth seems to have survived distinct from the cultural practices and false knowledge that people spread (when they may not know what they are talking about or implying).