"They were on their way up to Jerusalem, with Jesus leading the way, and the disciples were astonished, while those who followed were afraid. Again he took the Twelve aside and told them what was going to happen to him." NIV translation
The final trip to Jerusalem continues and we see that the disciples were amazed by the fact that Jesus did not sway from His purpose. He had already told them twice what was going to happen when they got there and, now, He tells them again. This would have been the third time and we remember that the number three is associated with the earthly display of God's will.
"'We are going up to Jerusalem,' he said, 'and the Son of Man will be delivered over to the chief priests and the teachers of the law. They will condemn him to death and will hand him over to the Gentiles, who will mock him and spit on him, flog him and kill him. Three days later he will rise.'" NIV translation
For the third time, Jesus tells them exactly what is going to happen when they get to Jerusalem. It is important to note that God's plan was carried out by both Jew and Gentile. Both groups took part in His death and both groups can take part in salvation through Him.
"Then James and John, the sons of Zebedee, came to him. 'Teacher,' they said, 'we want you to do for us whatever we ask.' 'What do you want me to do for you?' he asked. They replied, 'Let one of us sit at your right and the other at your left in your glory.'" NIV translation
We notice that the disciples addressed Jesus as Teacher even though He had explained how He was much more than that. Once again, it shows that they were really unaware of the spiritual aspect of Jesus' ministry. The same type of thing had happened when Jesus had shared God's plan with them the second time. They were still focused on earthly position and power. The positions that they desired were positions of honor and would have been a symbol of their closeness to Him.