91. What correspondence is, may be seen from the human face. In a face which has not been taught to dissemble, all the affections of the mind come to view in a natural form as in their image. This is why the face is said to be the index of the mind; that is, it is man's spiritual world presented in his natural world. In the same way, the things pertaining to the understanding present themselves in speech, and those pertaining to the will present themselves in the movements of the body. All things, therefore, that are done in the body, whether in the face, in speech or in bodily movements, are called correspondences.