Now I tell you before it come, that, when it is come to pass, ye may believe that I am he. That - ye may believe - These frequent predictions of his death, so circumstantial in themselves, had the most direct tendency to confirm the disciples, not only in the belief of his being the Messiah, but also in that of his omniscience.
Related Commentaries of John 13:19
John 13:19
19 Nowb I tell you before it come, that, when it is come to pass, ye may believe that I am he.