Numerology is the art of interpretation of numbers related to the date of birth or name of the individual. Numerologists believe that everything, including abstract concepts, can be converted into numbers and that every number represents a spectrum of related concepts ranging from positive and progressive to negative and destructive. Knowledge of these numbers can be utilized to better ones strengths, diminish the weaknesses and move within the flow of life and use your energies more wisely. In other words, one can build the positive aspects and progress in life or use the negative and find setbacks and even ultimate destruction.

Pythagoras, the Greek mathematician who lived from 569-470 B.C., is generally accepted as the "father" of Numerology. But there is evidence that numerology was in use much before in China, Greece, Rome, and Egypt. The actual origins of numerology predate Pythagoras, the most popular being from the Hindu Vedas. Numerology is based on Pythagoras belief that reality is mathematical. For their readings, modern numerologists adopt the original Pythagorean system in which a number value ranging from one to nine is assigned to every letter of the alphabet: A is 1, B is 2, C is 3 and so on for interpretation purpose.

Given below are the links to more hubs on the subject where i have described the importance and calculation of destiny number, birth date or ruling number etc.