4053. Hitherto no one has known that there are such correspondences, and I am well aware that men will marvel when they hear of them; and this because they do not know what the internal man is, and what the external, and that the internal man is in the spiritual world, and the external in the natural; and that it is the internal man that lives within the external, and that flows into it and directs it. And yet from this fact, as well as from what has been adduced above in n. 4044, it is possible to know that there is an influx, and that there is a correspondence. That such is the case is most fully known in the other life, and also that what is natural is nothing else than a representation of the spiritual things from which it comes forth and subsists; and that the representation by the natural is precisely in accordance with its correspondence.

4044. Representations are nothing but images of spiritual things in natural ones, and when the former are rightly represented in the latter, the two correspond. Yet the man who knows not what the spiritual is, but only the natural, is capable of thinking that such representations and derivative correspondences are impossible, for he might say to himself, How can the spiritual act upon the material? But if he will reflect upon the things taking place in himself every moment, he may be able to gain some idea of these matters; namely, how the will can act upon the muscles of the body, and effect real actions; also how thought can act upon the organs of speech, moving the lungs, trachea, throat, tongue, and lips, and thus produce speech; and also how the affections can act on the face, and there present images of themselves, so that another often thereby knows what is being thought and felt. These examples may give some idea of what representations and correspondences are. As such things are now presented in man, and as there is nothing that can subsist from itself, but only from some other, and this again from some other, and finally from the First, and this by a nexus of correspondences, they who enjoy some extension of judgment may draw the conclusion that there is a correspondence between man and heaven; and further, between heaven and the Lord who is the First.