Jesus’ disciples James and John, the sons of Zebedee, approached Jesus with their mother to ask a favor. They asked Jesus to be allowed to sit on either side of him when he achieved his glory in the kingdom of heaven.
But Jesus said “You have no idea what you are asking for! Are you able to undergo all the trials and sufferings that I must endure?”
“We are able,” they answered.
Jesus said “You will indeed go through the trials that I will go through, but it is not up to me to say who sits with me in heaven. That is something that is decided by my heavenly Father.”
When the other disciples realized what James and John were asking, they were angry because of their audacity. Jesus called all the disciples together and said “The Gentiles have people who exercise power over them such as kings and men of high positions. Things must be different among all who follow me. For you, whoever wants to be great must be like a servant. And whoever wants to be the best must serve everyone. For even I did not come to be served, but rather to be a servant, and even to give my life as a ransom for many people.”
MT 20:20-28, MK 10:35-44