The Spirit of Christ, in the Old Testament prophets, testified beforehand his sufferings, and the glory that should follow, 1Pe 1:11. The disciples' prejudices were so strong, that they would not understand these things literally.
They were so intent upon the prophecies which spake of Christ's glory, that they overlooked those which spake of his sufferings. People run into mistakes, because they read their Bibles by halves, and are only for the smooth things.
We are as backward to learn the proper lessons from the sufferings, crucifixion, and resurrection of Christ, as the disciples were to what he told them as to those events; and for the same reason; self-love, and a desire of worldly objects, close our understandings.