In all of it.
We agree He is there from the beginning..But the Jews do not see it, because most prophecy is hidden and not direct ( I think) and thus it is not a surprise that the words of Jesus the prophet are veiled or that they are layered like an onion and may cover more than one event ....(as I would claim is the case in ch 17)
Some time, it might be worth asking the Jews who they think is the Angel of Great Council in Isaiah 9, the person of the Theophanies, etc.
The Jews too, know of a Word of God and the Holy Spirit. I think their misunderstanding is over the philosophical terms of "homoousia", "hypostasis", etc., and the personal identification of Jesus Christ as the incarnate God.
You might find this interesting:
http://www.romanity.org/htm/rom.24.en.jewish_and_christian_orthodox_dialogue.htm