In a 1933 lecture Jung went on at length about his views on the Tarot, noting the late Medieval cards are "really the origin of our pack of cards, in which the red and the black symbolize the opposites, and the division of the four—clubs, spades, diamonds, and hearts—also belongs to the individual symbolism.
They are psychological images, symbols with which one plays, as the unconscious seems to play with its contents.” The cards, said Jung, “combine in certain ways, and the different combinations correspond to the playful development of mankind.” This, too, is how Tarot works—with the added dimension of “symbols, or pictures of symbolical situations.” The images—the hanged man, the tower, the sun—“are sort of archetypal ideas, of a differentiated nature.”