2988. That some idea may be formed of representations and correspondences, it is only necessary to reflect on the things of the mind, that is, of the thought and will. These things so beam forth from the face that they are manifest in its expression; especially is this the case with the affections, the more interior of which are seen from and in the eyes. When the things of the face act as a one with those of the mind, they are said to correspond, and are correspondences; and the very expressions of the face represent, and are representations. The case is similar with all that is expressed by the gestures of the body, and with all the acts produced by the muscles; for it is well known that all these take place according to what the man is thinking and willing. The gestures and actions themselves, which are of the body, represent the things of the mind, and are representations; and in that they are in agreement, they are correspondences.