Luke 9:46

‘And there arose a reasoning among them, which of them was the greatest.'

It is quite clear that the disciples had not learned the lesson of their encounter with the demon-possessed boy. Instead of feeling ashamed at their failure, and buckling down to prayer and humility in the light of it, they concentrated more on estimating their own greatness. And this then led to discussions among them as to who was the greatest. We are not told what measures they used by which to decide the issue. Possibly they compared their skills in preaching, in healing, in administration and so on, or the importance of some of their converts, or the ways in which Jesus relied on them, overlooking how much of their ability came through the work of the Holy Spirit, and that they only did what it was their duty to do. They probably failed to take note of the measure that Jesus set, ‘whoever shall do and teach these least commandments, he shall be called great within the Kingly Rule of Heaven' (Matthew 5:19), commandments which included loving their neighbour as themselves. Their thought was rather of prestige and position. But their arguments inevitably soon came to the attention of Jesus.