It's the study of mystical relationships between numbers, letters, and patterns. As in most methods of divination, numerology is a tool that is used to gain a deeper knowledge of the self, others, and how we relate to the world at large.What does the number 7 mean in numerology? In numerology, the number 7 means logic, understanding, spirituality, and intellect. People with the number 7 are searchers for a deeper meaning, and they won't stop chasing this meaning until they uncover the truth.