Picture a hand, foot, or head cut off from the body and lying somewhere alone. That's what a person becomes when they get upset about what happens to them and separate themselves from it. Or when they act against the natural law that connects all people. Or when they act without kindness. If you do any of these things, you cut yourself off from the natural unity of all things. You were born as part of the whole, but now you have separated yourself.
If ever thou sawest either a hand, or a foot, or a head lying by itself, in some place or other, as cut off from the rest of the body, such must thou conceive him to make himself, as much as in him lieth, that either is offended with anything that is happened, (whatsoever it be) and as it were divides himself from it: or that commits anything against the natural law of mutual correspondence, and society among men: or, he that, commits any act of uncharitableness. Whosoever thou art, thou art such, thou art cast forth I know not whither out of the general unity, which is according to nature. Thou went born indeed a part, but now thou hast cut thyself off.