Luke 9:46-50
46 An argument arose among the disciples about which of them was the greatest.
47 Jesus realized the intention of their hearts and took a child and placed it by his side
48 and said to them, "Whoever receives this child in my name receives me, and whoever receives me receives the one who sent me. For the one who is least among all of you is the one who is the greatest."
49 Then John said in reply, "Master, we saw someone casting out demons in your name and we tried to prevent him because he does not follow in our company."
50 Jesus said to him, "Do not prevent him, for whoever is not against you is for you."
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I can think of at least three times in scripture where we're told of Christ's disciples are arguing about who among them is the greatest. In all three cases, Christ responded that whomever is least among the disciples is the greatest.
It's that simple. That's why humility is such an important virtue, and worthy of our time to develop.
The funny thing about humility is that it is the opposite of pride -- Satan's sin, the sin that caused the fall of man. Pride is ingrained in our earthly nature. THE ONLY WAY to develop humility is to surrender completely to God and submit to the transformation from life in the flesh to life in the spirit.
There is no other way.