We have been talking about the correspondence of our inner or spiritual person with our outer or natural one. In what follows, though, we need to discuss the correspondence of heaven in its entirety with the individual human being.
It has already been explained that heaven in its totality reflects a single person, and that it is a person in image and is therefore called the universal human. It has also been explained that for this reason, the heavenly communities that make up heaven are arranged like the members, organs, and viscera in a human being. So there are communities that are located in the head, in the chest, in the arms, and in the particular parts of these members (see above, Sections 59–72). The communities that are in a particular member, then, correspond to the like member in a human being. For example, the ones in the head in heaven correspond to our head, the ones in the chest there correspond to our chest, the ones in the arms correspond to our arms, and so on for the rest. We continue in existence because of this correspondence, for heaven is the only basis of our continued existence.
from Heaven and Hell, Sections 93, 94