"...the doctrine of correspondences, respecting which Swedenborg states that, although it is unknown in our time, it was regarded by very ancient humanity, the initial celestial humanity, as a true science, indeed as the preeminent science, the science of sciences, and it was so universally known that men wrote all of their books at that time in the "language of correspondences." Similarly, their rituals and the ceremonies of their religion consisted solely of correspondences, and it is because they thought spiritually in this way about terrestrial things that they were in community with the angels of heaven."
                    Henry Corbin, "Swedenborg and Esoteric Islam"
                    (p.52)