Shifting emphasis -- Matt. 17
There are several references in this chapter as well about him being God's son. It is as if he is saying, "Things are about to come that will make you doubt if the kindgom is really here, and if I am the messiah, and the King. he is saying, I am the Son of God, I am the Messiah, and this is the way that things are going to happen. I will die and rise again. The disciples are of course grieved, but they still don't get it.