In mythology, Mercury (Hermes in Greek mythology) is a messenger, the god of trade and the guide to the Underworld.

The oldest of all systems observing the human behavior, the Destiny cards system is based on mathematical sequences of a natural order of the earth. 52 cards in the deck represent 52 weeks of the year. Four suits represent four seasons. Each card has its own number starting from 1 to 52 following an order of our seasonal development - from spring to winter, from a young age to an old. It does contain insights of the two parts of a human being - body and spirit - which could make any study incredibly powerful on its own. Otherwise, we have only two major choices (plus one that is not officially excepted as science, astrology), - Psychology and Religion.