Matthew 18:1-4

In that hour, the disciples drew near to Jesus, saying, "Whom do you consider to be greater in the kingdom of heaven?" And Jesus, calling to himself a little child, placed him in their midst. And he said: "Amen I say to you, unless you change and become like little children, you shall not enter into the kingdom of heaven. Therefore, whoever will have humbled himself like this little child, such a one is greater in the kingdom of heaven.