3565. It appears, moreover, hence what is the nature of correspondences, that it is not known, in the interior degree, that there are things which correspond. That spiritual food corresponds with the food of the body, for the life of the body is sustained by good and wholesome food; so in other things. Nor is it known that the cogitative and voluntary principles correspond to the muscles. Hence also it appears that it is not known, by inferior spirits, that the things which exist with angelic spirits correspond; so also the things with the angels. Since these correspondences are not known, therefore they are scarcely acknowledged; wherefore it is absurd to wish to penetrate into the inmost and highest mysteries, which can never fall into the perception of men; even angelic things, gross as they are, do not fall into it, how then shall divine? - 1748, October 14.