Hebrew mystics who wanted to reveal the physical and spiritual laws that govern mankind's soul and the cosmos devised the Kabbalah. This form of numerology assigns a number to each of the 22 letters of the Hebrew alphabet. Words can then be translated and reduced to a single number, each of which has its own specific interpretation. Everyone has their own personal numbers based on their date of birth and their first and last name. The birth date is your 'life number;' it is unchanging and represents your inner nature. Your 'name number' is the way you express yourself to the world - your outward personality.