I think one of the things that must have deeply impressed everyone who heard Jesus himself teach was the fact that he spoke with such authority about things that other people knew nothing about. Remember how in the Gospels he seems to read the thoughts of other people's minds. He answers questions before they are even asked. He accurately identifies the motives that move people to speak or act, and, even more than this, he speaks of unseen things with familiarity, as though he had seen them himself. He describes what God is like, and the nature of angels. He describes what happens after death. He predicts future events with pinpoint accuracy. At the close of his ministry, as he was about to leave his disciples, they were filled with foreboding and despair not only because of the loss of his presence, but because of the loss of his wisdom and power. In the Upper Room Discourse he said to them, "I will not leave you orphans; I will not leave you alone. If I go away I will send another Comforter to you and he will guide you into all the truth. He will take of the things of mine and show them unto you, and he will say to you the things that I have not been able to say," (John 14:16-18 KJV). Remember that he said, "I have many things to say to you but you are not able to bear them yet. When the Spirit of truth comes, he will guide you into all truth," (John 16:13 KJV).