Numerology is any of many systems, traditions or beliefs in a mystical or esoteric relationship between numbers and physical objects or living things.
Numerology and numerological divination were popular among early mathematicians, such as Pythagoras, but are no longer considered part of mathematics and are regarded as pseudomathematics by most scientists. This is similar to the historical development of astronomy out of astrology, and chemistry from alchemy. Today, numerology is often associated with the occult, alongside astrology and similar divinatory arts. The term can also be used for those who, in the view of some observers, place excess faith in numerical patterns, even if those people don't practice traditional numerology.
Historians believe that modern numerology is an integration of the teachings from Ancient Babylonia, Pythagoras and his followers (6th century B.C. Greece), astrological philosophy from Hellenistic Alexandria, early Christian mysticism, the occultism of the early Gnostics and the Hebrew system of the Kabbalah. The Indian Vedas, the Chinese "Circle of the Dead", and the Egyptian "Book of the Master of the Secret House" (Ritual of the Dead) are records giving strong evidence that Numerology dates back thousands of years.
Pythagoras and other philosophers of the time believed that because mathematical concepts were more "practical" (easier to regulate and classify) than physical ones, they had greater actuality. This is an idea in harmony with philosophical pragmatism and a choice for permanent concepts over changeable physicality.
Number definitions
0. Everything and nothing or absoluteness, the All
1. Individual. Aggressor. Yang.
2. Balance. Union. Receptive. Yin.
3. Communication/interaction. Neutrality.
4. Creation.
5. Action. Restlessness.
6. Reaction/flux. Responsibility.
7. Thought/consciousness.
8. Power/sacrifice.
9. Completion.
10. Rebirth.
11, 22, & 33: Master Numbers, not reduced to single digits
Wikipedia.
