“For the one who is least among all of you is the one who is the greatest.” (Luke 9:48)

According to Gospel of Matthew, the disciples were arguing about who was the greatest. But the Gospel of Luke only mentioned the statement tactfully: It said that an “argument” arose among them about who is the greatest. Perhaps the disciples had bad memory or did not understand Jesus’ saying to Peter not long ago, “And so I say to you, you are Peter, and upon this rock I will build my church, and the gates of the netherworld shall not prevail against it. I will give you the keys to the kingdom of heaven. Whatever you bind on earth shall be bound in heaven; and whatever you loose on earth shall be loosed in heaven.” (Matthew 16:18-19)

“For the one who is least among all of you is the one who is the greatest.” It seems that Jesus was saying this to Peter only. However, from the Pontifical document, the Pope claims himself as “a servant of the servants”. (Servus Servorum in Latin).

Mother Teresa of Calcutta had changed her whole life because of the same words. She was willing to serve God from “the poorest among the poor”.

“The smallest” in this context refers to those who are ignored, those who are humble or those who are disliked. Anyhow, Jesus wants us to accept them as we accept Him.
The spirit of tolerance is where peace comes from and it is also the key spirit in respecting God.