But they did not understand this saying — indeed it was kept a secret from them, to prevent them from fathoming it — and they were afraid to ask him about this saying.
(His disciples did not understand this at first; but when Jesus was glorified, then they remembered this had been written of him and had happened to him.)
So the people answered, "We have learned from the Law that the Christ is to remain for ever; what do you mean by saying that the Son of man must be lifted up? Who is this Son of man?"