Matthew 18:1-6 NIV

[1] At that time the disciples came to Jesus and asked, “Who, then, is the greatest in the kingdom of heaven?” [2] He called a little child to him, and placed the child among them. [3] And he said: “Truly I tell you, unless you change and become like little children, you will never enter the kingdom of heaven. [4] Therefore, whoever takes the lowly position of this child is the greatest in the kingdom of heaven. [5] And whoever welcomes one such child in my name welcomes me. [6] “If anyone causes one of these little ones—those who believe in me—to stumble, it would be better for them to have a large millstone hung around their neck and to be drowned in the depths of the sea.