""The Key to the Universe"" is a spiritual book written by Harriett Augusta Curtiss that explores the significance of numbers and symbols in various religions and spiritual practices. The author delves into the hidden meanings behind these symbols and how they can be used as tools to unlock the mysteries of the universe. The book provides insights into the spiritual significance of numbers such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12, as well as the symbolism of various shapes, colors, and geometric patterns. The author also explores the connection between numerology and astrology, and how they can be used together to gain deeper insights into the spiritual realm. Overall, this book is a valuable resource for anyone interested in exploring the spiritual significance of numbers and symbols in various spiritual practices and religions.1917. Partial Contents: Origin of numerical systems; Symbols; Numbers 1-10, Hebrew numbers and letters; Tarot correspondences. Be sure to see The Key of Destiny, the sequel to this book also published by Kessingers.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.