Charles Ellicott Commentary Matthew 18:8-9

"And if thy hand or thy foot causeth thee to stumble, cut it off, and cast it from thee: it is good for thee to enter into life maimed or halt, rather than having two hands or two feet to be cast into the eternal fire. And if thine eye causeth thee to stumble, pluck it out, and cast it from thee: it is good for thee to enter into life with one eye, rather than having two eyes to be cast into the hell of fire." — Matthew 18:8-9 (ASV)

If thy hand or thy foot offend thee — (See Notes on Matthew 5:29-30.) The disciples had heard these words before in the Sermon on the Mount, but their repetition, sharpened by a special, personal application addressed not to the multitude but to the Twelve, gave them a new and solemn emphasis.