Matthew 18
Who is the greatest, and causing others to stumble
At the same time came the disciples unto Jesus, saying, Who is the greatest in the kingdom of heaven? And Jesus called a little child unto him, and set him in the midst of them, And said, Verily I say unto you, Except ye be converted, and become as little children, ye shall not enter into the kingdom of heaven. Whosoever therefore shall humble himself as this little child, the same is greatest in the kingdom of heaven. And whoso shall receive one such little child in my name receiveth me. But whoso shall offend one of these little ones which believe in me, it were better for him that a millstone were hanged about his neck, and that he were drowned in the depth of the sea.
Woe unto the world because of offences! for it must needs be that offences come; but woe to that man by whom the offence cometh! Wherefore if thy hand or thy foot offend thee, cut them off, and cast them from thee: it is better for thee to enter into life halt or maimed, rather than having two hands or two feet to be cast into everlasting fire. And if thine eye offend thee, pluck it out, and cast it from thee: it is better for thee to enter into life with one eye, rather than having two eyes to be cast into hell fire.
The disciples ask who is greatest in the kingdom of heaven. Jesus places a child among them and says they must change and become like children to enter the kingdom; whoever humbles himself like this child is greatest, and whoever welcomes such a child in his name welcomes him. But anyone who causes one of these 'little ones' to sin would be better off drowned with a millstone round his neck, and it is better to lose a hand, foot or eye than to be thrown into the fire.
What does this mean?
To 'be converted' (KJV) or 'turn' (WEB) means to change direction. To 'offend' (KJV) or 'cause to stumble' (WEB) means to lead someone into sin or away from faith. The millstone is literally a 'donkey's millstone', the large upper stone of a mill turned by an animal.
Historical context
Children had little status in the ancient world: they had no legal standing and were valued mainly for their future. The point is not children's supposed innocence but their lowliness and dependence.
Why does it matter?
This begins the fourth of Matthew's five teaching blocks, often called the community discourse, about how disciples are to treat one another. The 'little ones' are its vulnerable members; the hand-and-eye sayings repeat 5:29–30, here applied to harm done to others. The reversal of status returns in 20:25–28.
Editorial notes, not scripture.