Numerology is any belief in the divine, mystical relationship between a number and one or more coinciding events. It is also the study of the numerical value of the letters in words, names and ideas. It is often associated with the paranormal, alongside astrology and similar divinatory arts.
As an element of astrology and fortune-telling, numerology has long been employed to predict future events. For many early Christians, 3 represented the Trinity, 6 represented earthly perfection, and 7 represented heavenly perfection; and still today, many of us like to group things into sets of 3 or 7, for no particular reason. Numerology has also been used to interpret personality; in particular, numerologists may assign numbers to each letter of a person's name and use the resulting figures, along with the person's date of birth, as a guide to his or her character.