John Chrysostom, on 1Cor 12:26

"And whether one member suffereth all the members suffer with it; or one member is honored, all the members rejoice with it."

"Yea, with no other view," saith he, "did He make the care He requires common, establishing unity in so great diversity, but that of all events there might be complete communion. Because, if our care for our neighbor be the common safety, it follows also that our glory and our sadness must be common." Three things therefore he here demands: the not being divided but united in perfection: the having like care for another: and the considering all that happens common. And as above he saith, "He hath given more abundant honor to that part which lacked," because it needeth it; signifying that the very inferiority was become an introduction to greater honor; so here he equalizes them in respect of the care also which takes place mutually among them. For "therefore did he cause them to partake of greater honor," saith he, "that they might not meet with less care." And not from hence only, but also by all that befalls them, good and painful, are the members bound to one another.

Thus often when a thorn is fixed in the heel, the whole body feels it and cares for it: both the back is bent and the belly and thighs are contracted, and the hands coming forth as guards and servants draw out what was so fixed, and the head stoops over it, and the eyes observe it with much care. So that even if the foot hath inferiority from its inability to ascend, yet by its bringing down the head it hath an equality, and is favored with the same honor; and especially whenever the feet are the cause of the head's coming down, not by favor but by their claim on it. And thus, if by being the more honorable it hath an advantage; yet in that, being so it owes such honor and care to the lesser and likewise equal sympathy: by this it indicates great equality. Since what is meaner than the heel? what more honorable than the head? Yet this member reaches to that, and moves them all together with itself.

Again if anything is the matter with the eyes, all complain and all are idle: and neither do the feet walk nor the hands work, nor doth the stomach enjoy its accustomed food; and yet the affection is of the eyes. Why dost thou cause the stomach to pine? why keep thy feet still? why bind thy hands? Because they are tied to the feet, and in an unspeakable manner the whole body suffers. For if it shared not in the suffering, it would not endure to partake of the care. Wherefore "that the members may have the same care one for another," he added, "whether one member suffereth, all the members suffer with it; or one member is honored, all the members rejoice with it."

"And how do they rejoice with it?" say you. The head is crowned, and the whole man is honored. The mouth speaks, and the eyes laugh and are delighted. Yet the credit belongs not to the beauty of the eyes, but to the tongue. Again if the eyes appear beautiful, the whole woman is embellished: as indeed these also, when a straight nose and upright neck and other members are praised, rejoice and appear cheerful: and again they shed tears in great abundance over their griefs and misfortunes, though themselves continue uninjured.