Bede the Venerable — as excerpted in the Catena Aurea on Mark 9:43-50

“(ubi sup.) That is, He calls by the name of hand, our intimate friend, of whose aid we daily stand in need; but if such an one should wish to do us a hurt in what concerns our soul, he is to be driven away from our society, lest by choosing a portion in this life with one who is lost, we should perish together with him in that which is to come. Where fore there follows, It is better for thee to enter into life maimed, than having two hands to enter into hell.”