4. In the Ancient Churches it was very well known that chariots and horses signified such things, since those Churches were representative Churches, and among those who were in them, the science of correspondences and representations ranked as the most distinguished science. From those Churches the signification of a horse, as being the understanding, was handed down to the wise men round about, even into Greece. Hence, it was their custom, when they were describing the sun, in which they placed the god of their wisdom and intelligence, to attribute to it a chariot and four fiery horses. And when they were describing the god of the sea, because the sciences which exist from the understanding were signified by the sea, they endowed that also with horses. And when they were describing the origin of the sciences from the understanding they conceived of a winged horse, which with its hoof caused a fountain to break forth, at which were nine virgins, who were the sciences. For from the Ancient Churches they knew that by a horse was signified the understanding, by wings spiritual truth, by a hoof something scientific derived from the understanding, and by a fountain doctrine from which come the sciences. Nor is anything else signified by the Trojan horse than a device of their understanding for destroying the walls. Indeed at the present time when the understanding is described after the accepted custom among those ancient people, it is usual to describe it as a flying horse, or Pegasus, doctrine as a fountain, and the sciences as virgins. But scarcely anyone knows that the horse, in a mystic sense, signifies the understanding, and still less that these significatives have been passed down to the Gentiles from the Ancient Representative Churches.