4. That such is the signification of "chariots" and "horses" was well known in the ancient churches; for those churches were representative churches, and with those who were in them, the science of correspondences and representations was the chief of all sciences. The signification of the horse, as being understanding, was derived by the wise round about, even to Greece, from those churches. Hence it was, when they would describe the sun, in which they placed their God of wisdom and intelligence, that they attributed to it a chariot and four horses of fire. And when they would describe the God of the sea, since by the sea were signified sciences derived from the understanding, that they also attributed horses to him. And when they would describe the origin of the sciences from the understanding, they represented it by a winged horse, which with its hoof broke open a fountain, at which sat nine virgins called the sciences. For from the ancient churches they received the knowledge that "the horse" signifies the understanding; "wings," spiritual truth; "the hoof," what is scientific from the understanding; and "a fountain," doctrine from which sciences are derived. Nor is anything else signified by "the Trojan horse," than an artificial contrivance devised by their understanding for the purpose of destroying the walls. Even at this day, when the understanding is described after the manner received from those ancients, it is usual to figure it by a flying horse or Pegasus; so, likewise, doctrine is described by a fountain, and the sciences by virgins; but scarcely anyone knows that "the horse," in the mystic sense, signifies the understanding; still less that those significatives were derived by the Gentiles from the ancient representative churches.