The Core of It All

The 22 Hebrew Letters and the 22 Tarot Trumps can be divided into three sets (3,7, 12) which are most effectively expressed through the language of Astrology

The Three Modalities
In astrology, the concept of Yang is expressed as the Cardinal modality. The concept of Yin is expressed as the Fixed modality. The state of being both and neither Yang and Yin is expressed as the Mutable modality. This trinity plays itself out throughout human thought and philosophy. It plays itself over and over through the tarot and all related metaphysical arts and sciences. It expresses itself in the Sefer Yetzirah with the Hebrew Letters Alef (Mutable), Mem (Fixed) and Shin (Cardinal).