The Tarot consists of the Minor Arcana, four suits of cards similar to our modern deck, and the Major Arcana, twenty-two allegorical or “trump” cards. Decker says the four-suit deck was invented in Asia Minor before AD 1000; Italian courtiers added the trumps in the 1400s. But Tarot was first used as a game. Tarot divination was only created in the 1700s by a Parisian fortuneteller who based the trump images on Hermeticism, which merges Greco-Egyptian alchemy, astrology, numerology, magic, and mysticism. Today, the suit-cards are often traced to the ancient Jewish Cabala. But, says Decker, they, too, acquired their meanings only in the 1700s, and he cites a lost numerical system based on Cabala at that time

Decker’s interpretation integrates three whole systems-astrological, arithmological, mystagogical (concerning initiation rites into the Mysteries).