Mark 9:34
But they kept quiet because on the way they had argued about who was the greatest — the silence communicates guilt: they had been arguing about greatness while Jesus was teaching about his death. The juxtaposition is Mark's sharpest contrast yet between the disciples' preoccupation (status in the kingdom) and Jesus' preoccupation (the cross that inaugurates the kingdom). The argument about greatness immediately after the second passion prediction is the ultimate failure to understand what the kingdom is.