Theophylact of Ohrid — as excerpted in the Catena Aurea on Mark 10:41-45

“The other Apostles are indignant at seeing James and John seeking for honour; wherefore it is said, And when the ten heard it, they began to be much displeased with James and John. For being influenced by human feelings, they were moved with envy; and their first displeasure arose from their seeing that they were not taken up by the Lord; before that time they were not displeased because they saw that they themselves were honoured before other men. At this time the Apostles were thus imperfect, but afterwards they yielded the chief place one to another. Christ however cures them; first indeed by drawing them to Himself in order to comfort them; and this is meant, when it is said, But Jesus called them to him; then by shewing them that to usurp honour, and to desire the chief place, belongs to Gentiles. Wherefore there follows: And saith unto them, Ye know that they which are accounted to rule over the Gentiles exercise lordship; and their great ones exercise authority over them. The great ones of the Gentiles thrust themselves into the chief place tyrannically and as lords. It goes on: But so shall it not be among you.”