And when Jesus Christ advised that one should self-mutilate by removing an eye, was He making the determination that two eyes is one too many? Or is it possible that there is a (somewhat vast) disparity between the language used by a 1st century Hebrew-speaking man and the understanding of a 21st century English-speaking audience?
This is in reference to scandal, which is given or received bad example. St. John Chrysostom said members is symbolic of family members.
Matthew 18
Temptations and Trespasses
(Mark 9:42-50; Luke 17:1-4)
7 Woe to the world because of scandals. For it must needs be that scandals come: but nevertheless woe to that man by whom the scandal cometh.
8 And if thy hand, or thy foot scandalize thee, cut it off, and cast it from thee. It is better for thee to go into life maimed or lame, than having two hands or two feet, to be cast into everlasting fire. 9 And if thy eye scandalize thee, pluck it out, and cast it from thee. It is better for thee having one eye to enter into life, than having two eyes to be cast into hell fire.
Haydock Commentary
Ver. 8. And if thy hand, or thy foot, &c. These comparisons are to make us sensible, that we must quit and renounce what is most dear to us, sooner than remain in the occasions of offending God. (Witham)
— These words more properly mean our relatives and friends, who are united to us as closely as the different members of the body. This he had touched upon before, yet he again repeats it, for nothing is so pernicious, nothing so dangerous, as the company and conversation of the dissolute. Connections of friendship and affinity, are sometimes more powerful in inclining us to good or evil, than open compulsion. On this account Christ, with great earnestness, commands us to cut with those most near and dear to us, when they are to us the immediate occasions of scandal. (St. Chrysostom, hom. lx.)
**Ver. 7. **It must needs be, not absolutely, but the weakness and wickedness of the world considered that scandals should happen. (Witham)
— Considering the wickedness and corruption of the world, such things always will happen; but the judgments of God, though slow, will be terrible in the extreme. Lento quidem gradu Divina procedit Vindicta, sed tarditatem gravitate compensat. (Val. Max.)
— We must not suppose for a moment that Christ subjects human actions to the control of rigid fatality. It is not the prescience or prediction of Christ, which causes these evils to take place; they do not happen, because Christ foretold them; but, Christ foretold them, because they would infallibly happen. The Almighty permits scandals, because the good are benefited by them, making them more diligent and more watchful: witness the great virtue of Job, of Joseph, and many others perfected in temptation. If the less virtuous receive any detriment from scandals, they owe it to their own sloth and laziness. (St. Chrysostom, hom. lx.)
— Jesus Christ pronounces a double wo to the man who bringeth scandal, and to the world which is punished by it. But why, asks St. Chrysostom does he bewail the miseries of the world, when it depended upon him to stretch forth his hand and remove them? He imitates the conduct of a good physician, who, after prescribing various remedies, feels himself obliged to declare to his patient, that by neglecting the prescriptions, he is increasing his distemper. Jesus Christ had left the throne of his glory, taken upon him the form of a servant, and suffered the greatest extremities, but seeing man so perverse as to reap no advantage from all he had done and suffered for him, he weeps over his miserable state. Nor is this without its particular fruit; for it frequently happens, that whom good counsel cannot move, prayers and tears, and the relation of the dismal consequences attendant on sin, bring to repentance. This also manifests his tenderness and boundless charity, since he weeps over the people, who of all others most contradicted him. (St. Chrysostom, hom. lx.)
See also Mark 10:
28 And Peter began to say unto him: Behold, we have left all things, and have followed thee. 29 Jesus answering, said: Amen I say to you, there is no man who hath left house or brethren, or sisters, or father, or mother, or children, or lands, for my sake and for the gospel, 30 Who shall not receive an hundred times as much, now in this time; houses, and brethren, and sisters, and mothers, and children, and lands, with persecutions: and in the world to come life everlasting. 31 But many that are first, shall be last: and the last, first.