The performers of the Major Arcana represent the central ideas of a reading. They silently declare the significant events will soon occur. The cards are number from zero to twenty-one. During a reading, sometimes the cards face the reader. On many occasions a card is upside-down or reversed. This changes the meaning. Now, the new principle is the opposite of the old meaning, in most cases. It is imperative to not change the direction of a card. It must be interpreted as it arrived.