Manifestation of Ego in the Disciples of Jesus

The Disciples of Christ experienced situations in which their "ego" manifested, and Christ always led them to in the way of the cross. If we were to highlight a few of these situations, here are some examples:
 
1.Disciple against disciple
But a controversy arose among them as to which of them might be the greatest [surpassing the others in excellence, worth, and authority]. (Luke 9:46)

The disciples of Jesus fought amongst themselves over who would be the greatest among them. These men, chosen by the Messiah, were still in the process of understanding why they had been called. They still believed or expected their "carnal self" to receive some reward in the matter, some position in the hierarchy high above the others.

Jesus responded by reminding them of the importance of humility and selflessness and encouraged them to focus on serving others rather than seeking their own greatness.
 
2. Arguing with disciples Outside their group
John said, Master, we saw a man driving out demons in Your name, and we commanded him to stop it, for he does not follow along with us. ⁵⁰ But Jesus told him, Do not forbid [such people]; for whoever is not against you is for you. (Luke 9:49-50 AMPC)

The disciples prohibited a man when they found someone from doing the same things as they were doing. Their "ego" was not willing to see anyone else release the power that Jesus had imparted to them. Their vision was not on extending the Kingdom but on satisfying their ego.

Again, Jesus responded by reminding them of the importance of collaboration and inclusivity and the need to focus on the greater goal of spreading the kingdom's message rather than protecting their own interests.

The key to not losing everything that you have received from the hand of God, which was given to you by the grace and the power of Christ, is to deal with self— deal with your "ego", your "old nature," the "old man," or the "sinful nature through the power of the Spirit and the Word.