Matthew 18:1-5 (TNIV)
At that time the disciples came to Jesus and asked, "Who, then, is the greatest in the kingdom of heaven?" He called a little child, whom he placed among them. And he said: "Truly I tell you, unless you change and become like little children, you will never enter the kingdom of heaven. Therefore, whoever takes a humble place—becoming like this child—is the greatest in the kingdom of heaven. And whoever welcomes one such child in my name welcomes me.