Arithmancy

Origin

Arithmancy is among the most ancient mantic arts. The Chaldean priests of Babylon (from around 600 BCE) practised systematic divination by numerical permutation, using letter-values and numerical patterns to interpret omens, names, and events. The Pythagorean school in Croton (Pythagoras of Samos, around 570 BCE) developed arithmancy into a philosophical discipline, the search for the divine principle in numerical relationships. The Greeks of the Hellenistic period combined Chaldean and Pythagorean methods with their own oracular traditions, producing detailed handbooks of arithmancy now mostly lost.

The Hebrew tradition's Gematria is a specific form of arithmancy applied to sacred Hebrew texts. The Arabic alchemical and astrological tradition preserved and developed arithmantic techniques through the Islamic Golden Age (eighth to thirteenth centuries CE). Cornelius Agrippa of Nettesheim (1486-1535), in his Three Books of Occult Philosophy, gave Renaissance Europe a comprehensive treatise on arithmancy alongside related esoteric arts. The term arithmancy itself appears in classical sources and is used in modern occult writing to distinguish the wider classical art from the narrower modern numerology. In contemporary culture, the term has been popularised by fictional treatments such as the Harry Potter novels, where Arithmancy is taught as a magical school subject.

Meaning and method

Classical arithmancy includes a broad family of techniques. Onomancy is divination by the numerical value of a name. Isopsephy is the Greek practice of finding words of equal numerical value and reading their hidden connections. Gematria is the Hebrew form. Numerical lot-casting (cleromancy with numbers) uses dice or marked stones whose results are interpreted by their numerical totals. Yi Jing-like systems use coin tosses to generate numerical hexagrams. Calculation of personal numbers from birth and name, the form most familiar today, is one branch of this older tree.

A central technique of arithmancy is the reduction of any number to a single digit by repeated addition, the operation called isopsephic reduction or theosophical addition. This is the operation by which arithmancy interprets large numbers (years, ages, dates) in terms of the nine primary digits and their archetypes. The Pythagorean school also used the tetractys (the triangle of ten points) as an interpretive device, and developed elaborate mappings between numbers, geometrical figures, the four elements, the planets, and the gods. Renaissance arithmancers like Agrippa extended these correspondences to angels, demons, days of the week, and biblical figures.

In practice

Modern numerology is the surviving practical branch of arithmancy. To consult arithmancy for a question, calculate the numerical value of the question itself (using the Greek or Pythagorean letter-table), reduce to a digit, and read the answer in the archetype of that digit. For example, to ask "Should I take this job?" you might calculate the numerical value of the company name and your own name, compare the two, and read the relationship. Other practices include drawing numbered lots, opening a sacred book to a random page and reading the numerical value of the first visible word, or summing the digits of a significant date.

The arithmancy of timing uses date-based calculation. The numerical value of any date, reduced to a digit, gives its vibrational quality; auspicious days for new beginnings should resonate with 1 or 3, days for completion with 9. The arithmancy of place uses the numerical value of place-names. The arithmancy of identity uses the value of the chosen name. In serious occult practice, arithmancy is rarely used alone but combined with astrology, tarot, and other systems. Use the destiny numerology and predictive numerology tools for the modern numerological branches of arithmancy.

Symbolic depth

Arithmancy rests on the conviction shared by Pythagoreans, Hebrew Kabbalists, Hermetic philosophers, and modern numerologists: that number is not an abstraction but a substance, the architecture of reality, the language in which the divine mind communicates with itself. To do arithmancy is to listen for that language in the apparent randomness of dates, names, and events, and to find the pattern behind the surface.

In Hermetic tradition, arithmancy is one of the seven liberal arts of the spiritual cosmos, alongside astrology, alchemy, theurgy, and the others. It is closely related to Gematria, the Hebrew form, and to the Pythagorean Vibration Number. In tarot, the major arcana itself can be read as an arithmantic system: each card a number, the deck a complete decimal cycle, the readings a divinatory arithmetic. Continue with Pythagorean numerology, Chaldean numerology, and Gematria for the surviving branches of this ancient art. The hub for further reading sits at numerology and the glossary.

Also known as

• Arithmomancy
• Number Divination
• Numeromancy
• Mantic Numerology
• Classical Numerology