Arithmancy — from the Greek arithmos (number) and manteia (prophecy) — holds that numbers are the hidden language of the cosmos. By reducing names, birth dates, and significant words to their numerical essences, the practitioner uncovers the governing forces of a person's life.
The system assigns each letter a numeric value and sums them into a single root digit. This digit is then interpreted against a framework of planetary correspondences: each number from 1 to 9 governs a celestial body and carries specific qualities of fortune, personality, and fate.
Arithmancy differs from modern numerology in its older, more directly astronomical framework, where knowing your ruling planet was central to understanding your destiny.