When it comes to our Christian experience, who would you say is the greatest? Many would pick a Billy Graham type. My heroes have always been missionaries who give up a comfortable western lifestyle to serve in some third world rubbish dump. Still others may choose a Mother Theresa type person. Many would choose their pastor or a great preacher they know. Those who are more astute may pick a quiet widow who is known as a prayer warrior.
Jesus picked none of these people, when asked who was the greatest. He picked a child. In Matthew 18:1-4 Jesus said that we must repent of our sins and become like a little child if we are to even enter the kingdom of heaven, and that whoever was humble like a little child was indeed the greatest. Wow! So, "greatness in the kingdom is a matter of humility, not power or position." (Hagner, D. A. (2002). Vol. 33B: Word Biblical Commentary : Matthew 14-28. Word Biblical Commentary (518). Dallas: Word, Incorporated.)