2989. It may also be known that images do not take shape in the mind exactly as they present themselves in the countenance, but are purely affections that take shape there. Nor do acts take shape in the mind exactly as they present themselves through actions in the body; rather, it is thoughts that are configured there. Things that belong to the mind are spiritual while those that belong to the body are natural. From this it is evident that a correspondence exists between spiritual things and natural, and that there is a representation of spiritual things within natural. Or what amounts to the same, when the things that belong to the internal man take shape in the external, the things which are visible in the external are representative of the internal, and those in the external which accord with those in the internal are correspondent.