A method of finding meanings in numbers or words by numerical equivalence. Pythagoras, the Greek mathematician who live from 569-470 B.C., is said by many to be the originator of much of what we call numerology today. It works by reducing a whole number or set of letters to a number between one and nine, inclusive (or possibly eleven and twenty-two as well). The methodology is usually something called Theosophical Arithmetic: Take the number, add all the digits together. Continue with the resulting sum until the it is in the range of one to nine. 

For an example:

1.Super star Rajnikanth was born on December 12th, 1949.
2.December is the twelfth month, so we have to add the 1 and the 2 of 12 (1+2=3) to get 3 as his month number.
3.Next we add the 1 and 2 of the birth date 12 (1+2=3) to get 3 as his birth date number.
4.Then we add up her year: 1+9+4+9=23. Adding 2 and 3 together gives us 5.
Finally, we add Rajnikanth's month number (3) and his day number (3) to his year number (5). 3+3+5 = 11.
5. Now continue adding the result 11 as (1+1) to get 2 as a single digit number.

Conclusion: Rajnikanth is a 2. Every individual has a number that defines who they are as a person, and predicts when and how they will have their greatest triumphs and worst tragedies.

Add up your own number to discover your value, which is then consulted against a set of properties that number. It is believed that one's name and birth date in particular can be analyzed to produce information on one's path in life, but also illumination may be received by analyzing other things.